#METABOLOMICS WORKBENCH parthosen_20210131_164908 DATATRACK_ID:2439 STUDY_ID:ST001678 ANALYSIS_ID:AN002736 PROJECT_ID:000000
VERSION             	1
CREATED_ON             	February 3, 2021, 9:28 am
#PROJECT
PR:PROJECT_TITLE                 	Quantitative analysis and genome-scale modeling of human CD4+ T-cell
PR:PROJECT_TITLE                 	differentiation reveals subset-specific regulation of glycosphingolipid pathways
PR:PROJECT_TYPE                  	MS: Targeted analysis
PR:PROJECT_SUMMARY               	This project is associated with five different studies(Part 1-5) and each study
PR:PROJECT_SUMMARY               	is associated with one dataset. All the datasets are submitted to Metabolomics
PR:PROJECT_SUMMARY               	Workbench. Part 1/5: It includes untargeted lipidomic analysis of CD4+ T-cell
PR:PROJECT_SUMMARY               	subsets(Th1,Th2,Th17 and iTreg cells) and their paired control (Th0) cells. Part
PR:PROJECT_SUMMARY               	2/5: It includes quantitative targeted measurements of sphingolipids(ceramides
PR:PROJECT_SUMMARY               	and glycosphingolipids) in Th17, iTreg, and their paired control(Th0)cells. Part
PR:PROJECT_SUMMARY               	3/5: It includes quantitative targeted measurements of sphingolipids(ceramides
PR:PROJECT_SUMMARY               	and glycosphingolipids) in Th17 cells before(scrambled / control)and after the
PR:PROJECT_SUMMARY               	triple knockdown of SPTLC1,2,3 genes (SPT de novo pathway: sphingolipid
PR:PROJECT_SUMMARY               	metabolism). Part 4/5: It includes quantitative targeted measurements of
PR:PROJECT_SUMMARY               	sphingolipids(ceramides, glycosphingolipids) in Th17 cells before (scrambled /
PR:PROJECT_SUMMARY               	control)and after the knockdown of UGCG gene(GCS pathway: sphingolipid
PR:PROJECT_SUMMARY               	metabolism). Part 5/5: It includes measurements of sphingolipids
PR:PROJECT_SUMMARY               	(sphingomyelins)in Th17 cells before (scrambled / control) and after the
PR:PROJECT_SUMMARY               	knockdown of UGCG gene(GCS pathway: sphingolipid metabolism).
PR:INSTITUTE                     	University of Turku
PR:DEPARTMENT                    	Systems Medicine, Turku Bioscience
PR:LABORATORY                    	Metabolomics
PR:LAST_NAME                     	Sen
PR:FIRST_NAME                    	Partho
PR:ADDRESS                       	Tykistökatu 6B, BioCity, 5th Floor, Turku, Southwest, 20521, Finland
PR:EMAIL                         	partho.sen@utu.fi
PR:PHONE                         	0469608145
#STUDY
ST:STUDY_TITLE                   	Quantitative measurements of sphingolipids in Th17 cells before and after the
ST:STUDY_TITLE                   	knockdown of UGCG gene (GCS pathway: sphingolipid metabolism) (part-IV)
ST:STUDY_TYPE                    	MS: Targeted analysis
ST:STUDY_SUMMARY                 	Part 4/5: It includes quantitative targeted measurements of sphingolipids
ST:STUDY_SUMMARY                 	(ceramides, glycosphingolipids) in Th17 cells before (scrambled / control) and
ST:STUDY_SUMMARY                 	after the knockdown of UGCG gene (GCS pathway: sphingolipid metabolism).
ST:INSTITUTE                     	University of Turku
ST:DEPARTMENT                    	Systems Medicine, Turku Bioscience
ST:LABORATORY                    	Metabolomics
ST:LAST_NAME                     	Sen
ST:FIRST_NAME                    	Partho
ST:ADDRESS                       	Tykistökatu 6B, BioCity, 5th Floor, Turku, Southwest, 20521, Finland
ST:EMAIL                         	partho.sen@utu.fi
ST:PHONE                         	0469608145
#SUBJECT
SU:SUBJECT_TYPE                  	Cultured cells
SU:SUBJECT_SPECIES               	Homo sapiens
SU:TAXONOMY_ID                   	9606
SU:GENDER                        	Not applicable
#SUBJECT_SAMPLE_FACTORS:         	SUBJECT(optional)[tab]SAMPLE[tab]FACTORS(NAME:VALUE pairs separated by |)[tab]Raw file names and additional sample data
SUBJECT_SAMPLE_FACTORS           	-	SCr-D1	Treatment:Scrambled | Types:Control	Cell Type=T17; RAW_FILE_NAME=Data20201120_T Cells Batch2_diluted and undiluted-1-dil.mzML
SUBJECT_SAMPLE_FACTORS           	-	KD-D1	Treatment:UGCG-knockdown | Types:Test	Cell Type=T17; RAW_FILE_NAME=Data20201120_T Cells Batch2_diluted and undiluted-2-dil.mzML
SUBJECT_SAMPLE_FACTORS           	-	SCr-D2	Treatment:Scrambled | Types:Control	Cell Type=T17; RAW_FILE_NAME=Data20201120_T Cells Batch2_diluted and undiluted-3-dil.mzML
SUBJECT_SAMPLE_FACTORS           	-	KD-D2	Treatment:UGCG-knockdown | Types:Test	Cell Type=T17; RAW_FILE_NAME=Data20201120_T Cells Batch2_diluted and undiluted-4-dil.mzML
SUBJECT_SAMPLE_FACTORS           	-	SCr-D3	Treatment:Scrambled | Types:Control	Cell Type=T17; RAW_FILE_NAME=Data20201120_T Cells Batch2_diluted and undiluted-5-dil.mzML
SUBJECT_SAMPLE_FACTORS           	-	KD-D3	Treatment:UGCG-knockdown | Types:Test	Cell Type=T17; RAW_FILE_NAME=Data20201120_T Cells Batch2_diluted and undiluted-6-dil.mzML
#COLLECTION
CO:COLLECTION_SUMMARY            	CD4+ T-cells were isolated from human umbilical cord blood as described
CO:COLLECTION_SUMMARY            	previously (Khan et al., 2020; Tripathi et al., 2017; Ubaid et al., 2018). CD4+
CO:COLLECTION_SUMMARY            	T-cells were isolated from human umbilical cord blood as described previously
CO:COLLECTION_SUMMARY            	[1-3]. 1. Ubaid, U. et al. Transcriptional Repressor HIC1 Contributes to
CO:COLLECTION_SUMMARY            	Suppressive Function of Human Induced Regulatory T Cells. Cell Rep 22,
CO:COLLECTION_SUMMARY            	2094-2106, doi:10.1016/j.celrep.2018.01.070 (2018). 2. Khan, M. M. et al. CIP2A
CO:COLLECTION_SUMMARY            	Constrains Th17 Differentiation by Modulating STAT3 Signaling. iScience 23,
CO:COLLECTION_SUMMARY            	100947, doi:10.1016/j.isci.2020.100947 (2020). 3. Tripathi, S. K. et al.
CO:COLLECTION_SUMMARY            	Genome-wide Analysis of STAT3-Mediated Transcription during Early Human Th17
CO:COLLECTION_SUMMARY            	Cell Differentiation. Cell Rep 19, 1888-1901, doi:10.1016/j.celrep.2017.05.013
CO:COLLECTION_SUMMARY            	(2017).
CO:SAMPLE_TYPE                   	T-cells
CO:STORAGE_CONDITIONS            	-80℃
#TREATMENT
TR:TREATMENT_SUMMARY             	For Th17 cell differentiation, isolated CD4+ cells were activated with a
TR:TREATMENT_SUMMARY             	combination of plate-bound anti-CD3 (750 ng/24-well culture plate well;
TR:TREATMENT_SUMMARY             	Immunotech/Beckman Coulter REF # IM-1304) and soluble anti-CD28 ((1ug/mL;
TR:TREATMENT_SUMMARY             	Immunotech/Beckman coulter REF # IM1376) antibodies in serum-free X-Vivo 20
TR:TREATMENT_SUMMARY             	medium (Lonza), in the absence (Th0) or presence (Th17) of IL-6 (20ng/ml, Roche,
TR:TREATMENT_SUMMARY             	Cat# 11138600 001); IL-1β (10ng/ml, R&D Systems Cat # 201 LB); TGF-β1
TR:TREATMENT_SUMMARY             	(10ng/ml, R&D Systems Cat# 240); anti-IL-4 (1 g/ml) R&D Systems Cat# MAB204)
TR:TREATMENT_SUMMARY             	and anti-IFN-γ (1 μg/ml R&D Systems Cat#MAB-285). Differentiation of Th17
TR:TREATMENT_SUMMARY             	cells was confirmed by measuring IL-17 expression by quantitative real-time PCR,
TR:TREATMENT_SUMMARY             	at 72 hours of Th17 / Th0 culturing. For iTreg cell culturing, after of CD25+
TR:TREATMENT_SUMMARY             	cells, done using LD columns and a CD25 depletion kit (Miltenyi Biotec),
TR:TREATMENT_SUMMARY             	CD4+CD25− cells were activated with plate-bound anti-CD3 (500 ng/24-well
TR:TREATMENT_SUMMARY             	culture plate well) and soluble anti-CD28 (500 ng/mL) at a density of 2 × 106
TR:TREATMENT_SUMMARY             	cells/mL of X-vivo 15 serum-free medium (Lonza). For iTreg differentiation, the
TR:TREATMENT_SUMMARY             	medium was supplemented with IL-2 (12 ng/mL), TGF-β (10 ng/mL) (both from R&D
TR:TREATMENT_SUMMARY             	Systems), all-trans retinoic acid (ATRA) (10 nM; Sigma-Aldrich), and human serum
TR:TREATMENT_SUMMARY             	(10%) and cultured at 37°C in 5% CO2. Control Th0 cells were stimulated with
TR:TREATMENT_SUMMARY             	plate-bound anti-CD3 soluble anti-CD28 antibodies without cytokines. For
TR:TREATMENT_SUMMARY             	confirmation of iTreg cell differentiation, we used intracellular staining to
TR:TREATMENT_SUMMARY             	measure, at 72 hours of iTreg culturing, expression of FOXP3 which is the major
TR:TREATMENT_SUMMARY             	transcription factor driving Treg differentiation. Intracellular staining was
TR:TREATMENT_SUMMARY             	performed using buffer sets of Human Regulatory T-cell Staining Kit
TR:TREATMENT_SUMMARY             	(eBioscience/Thermo Fisher Scientific), following the manufacturer’s protocol.
TR:TREATMENT_SUMMARY             	The following antibodies were used: anti-human FOXP3-PE (eBioscience, Cat. No.
TR:TREATMENT_SUMMARY             	12-4776-42) and rat IgG2a isotype control (eBioscience, Cat. No. 72-4321-77A).
TR:TREATMENT_SUMMARY             	All samples were acquired by a flow cytometer (LSRII) and analyzed either with
TR:TREATMENT_SUMMARY             	FlowJo (FLOWJO, LLC) or with Flowing Software. For Th1 and Th2 cells, purified
TR:TREATMENT_SUMMARY             	naive CD4+ T-cells were activated with plate-bound anti-CD3 (500 ng/24-well
TR:TREATMENT_SUMMARY             	culture plate well) and 500 ng/ml soluble anti-CD28 and cultured in the absence
TR:TREATMENT_SUMMARY             	(Th0) or presence of 2.5 ng/ml IL-12 (R&D Systems) (Th1) or 10 ng/ml IL-4 (R&D
TR:TREATMENT_SUMMARY             	Systems) (for Th2). At 48 hours following the activation of the cells, 17 ng/ml
TR:TREATMENT_SUMMARY             	IL-2 (R&D Systems) was added to the cultures. Differentiation of Th1 and Th2
TR:TREATMENT_SUMMARY             	cells was confirmed by measuring (using flow cytometry) the expression of T-bet
TR:TREATMENT_SUMMARY             	and Gata3 at 72 hours after cell activation. Briefly, cells were fixed and
TR:TREATMENT_SUMMARY             	permeabilized using the Intracellular Fixation & Permeabilization Buffer Set
TR:TREATMENT_SUMMARY             	(eBioscience / Thermo Fisher Scientific), according the manufacturer’s
TR:TREATMENT_SUMMARY             	protocol. The following antibodies were used: anti-human GATA3-PE (eBioscience,
TR:TREATMENT_SUMMARY             	12-9966), anti-human T-bet-BV711 (BD, 563320) and corresponding isotype controls
TR:TREATMENT_SUMMARY             	(BV711 Mouse IgG1, BD, 563044 and PE Rat IgG2b, eBioscience, 12-4031-82).
TR:TREATMENT_SUMMARY             	Samples were acquired by BD LSRFortessa™ cell analyzer and data were analyzed
TR:TREATMENT_SUMMARY             	using FlowJo software (FLOWJO, LLC).
#SAMPLEPREP
SP:SAMPLEPREP_SUMMARY            	The frozen cell preps were defrosted on ice. The samples were extracted using a
SP:SAMPLEPREP_SUMMARY            	modified Folch method[1]. 1. Sen, P. et al. Persistent Alterations in Plasma
SP:SAMPLEPREP_SUMMARY            	Lipid Profiles Before Introduction of Gluten in the Diet Associated With
SP:SAMPLEPREP_SUMMARY            	Progression to Celiac Disease. Clin Transl Gastroenterol 10, 1-10,
SP:SAMPLEPREP_SUMMARY            	doi:10.14309/ctg.0000000000000044 (2019). Briefly, 120 µL of cold (4 °C)
SP:SAMPLEPREP_SUMMARY            	extraction solvent (CHCl3: MeOH, (2:1 v/v) was added to the samples. The
SP:SAMPLEPREP_SUMMARY            	extraction solvent containing the following internal standards: C17
SP:SAMPLEPREP_SUMMARY            	Lactosyl(beta) ceramide (D18:1/17:0, 20 ppb), C17 Glucosyl(beta) ceramide
SP:SAMPLEPREP_SUMMARY            	(D18:1/17:0, 20 ppb), C17 ceramide (D18:1/17:0, 20 ppb), C16 ceramide-d7
SP:SAMPLEPREP_SUMMARY            	(d18:1-d7/16:0, 16,57 ppb), C18 ceramide-d7 (d18:1-d7/18:0, 8.75 ppb), C24
SP:SAMPLEPREP_SUMMARY            	ceramide-d7 (d18:1-d7/24:0, 20 ppb), and C24:1 ceramide-d7 (d18:1-d7/24:1(15Z),
SP:SAMPLEPREP_SUMMARY            	9,96 ppb). The samples were the vortexed briefly and left on ice for 30 minutes.
SP:SAMPLEPREP_SUMMARY            	The samples were then centrifuged (9400g, 5 min, 4 °C) and then 60 µL of the
SP:SAMPLEPREP_SUMMARY            	bottom layer was transfer to a clean mass spectrometry vial (2 mL). The samples
SP:SAMPLEPREP_SUMMARY            	were then stored at –80 °C.
#CHROMATOGRAPHY
CH:CHROMATOGRAPHY_SUMMARY        	Chromatographic separation was performed on an ACQUITY UHPLC BEH C18 column (2.1
CH:CHROMATOGRAPHY_SUMMARY        	mm × 100 mm, particle size 1.7 µm, Waters, Milford, MA, USA). The flow rate
CH:CHROMATOGRAPHY_SUMMARY        	was set at 0.4 ml/min throughout the run with an injection volume of 1 µL. The
CH:CHROMATOGRAPHY_SUMMARY        	following solvents were used for the gradient elution: Solvent A was H2O with 1%
CH:CHROMATOGRAPHY_SUMMARY        	NH4Ac (1M) and HCOOH (0.1%) added. Solvent B was a mixture of ACN: IPA (1:1 v/v)
CH:CHROMATOGRAPHY_SUMMARY        	with 1% NH4Ac (1M) and HCOOH (0.1%) added. The gradient was programmed as
CH:CHROMATOGRAPHY_SUMMARY        	follows: 0 to 2 min 35-80% B, 2 to 7 min 80-100 % B, 7 to 14 min 100% B. The
CH:CHROMATOGRAPHY_SUMMARY        	column was equilibrated with a 7min period of 35 % B prior to the next run.
CH:CHROMATOGRAPHY_TYPE           	Reversed phase
CH:INSTRUMENT_NAME               	ACQUITY UHPLC
CH:COLUMN_NAME                   	Waters BEH C18 (100 × 2.1 mm, 1.7 µm)
#ANALYSIS
AN:ANALYSIS_TYPE                 	MS
#MS
MS:INSTRUMENT_NAME               	ABI Sciex 5500 QTrap
MS:INSTRUMENT_TYPE               	Triple quadrupole
MS:MS_TYPE                       	ESI
MS:ION_MODE                      	POSITIVE
MS:MS_COMMENTS                   	The ceramides were quantified using a targeted multiple reaction monitoring
MS:MS_COMMENTS                   	(MRM) method using UHPLC as a separation technique. The LC separation was based
MS:MS_COMMENTS                   	on the global lipidomics method previously described 71. Briefly, the UHPLC was
MS:MS_COMMENTS                   	a Exion AD (Sciex) integrated system. The samples were held in a cool box at 15
MS:MS_COMMENTS                   	°C prior to the analysis. The needle was washed with both a 10% DCM in MeOH and
MS:MS_COMMENTS                   	ACN: MeOH: IPA: H2O (1:1:1:1 v/v/v/v) with 1% HCOOH for a total of 7.5 seconds
MS:MS_COMMENTS                   	each. The solvents were delivered using a quaternary solvent and a column oven
MS:MS_COMMENTS                   	(set to 50 °C). The separation was performed on an ACQUITY UHPLC BEH C18 column
MS:MS_COMMENTS                   	(2.1 mm × 100 mm, particle size 1.7 µm, Waters, Milford, MA, USA). The flow
MS:MS_COMMENTS                   	rate was set at 0.4 ml/min throughout the run with an injection volume of 1 µL.
MS:MS_COMMENTS                   	The following solvents were used for the gradient elution: Solvent A was H2O
MS:MS_COMMENTS                   	with 1% NH4Ac (1M) and HCOOH (0.1%) added. Solvent B was a mixture of ACN: IPA
MS:MS_COMMENTS                   	(1:1 v/v) with 1% NH4Ac (1M) and HCOOH (0.1%) added. The gradient was programmed
MS:MS_COMMENTS                   	as follows: 0 to 2 min 35-80% B, 2 to 7 min 80-100 % B, 7 to 14 min 100% B. The
MS:MS_COMMENTS                   	column was equilibrated with a 7min period of 35 % B prior to the next run. The
MS:MS_COMMENTS                   	mass spectrometer was a Sciex 5500 QTRAP (Sciex) set in scheduled MRM mode. All
MS:MS_COMMENTS                   	lipids were identified for their fatty acid composition by MS/MS to confirm
MS:MS_COMMENTS                   	their exact identification, there was also a linear relationship between the
MS:MS_COMMENTS                   	increasing number of carbons in the lipid chain and its corresponding retention
MS:MS_COMMENTS                   	time. Due to the isobaric nature of sugars we were unable to differentiate Glc
MS:MS_COMMENTS                   	and Glc head groups. All data were integrated using the quantitation tool in
MS:MS_COMMENTS                   	MultiQuant (3.0.3), all peaks were manually checked. Any analytes which were
MS:MS_COMMENTS                   	over the concentration of the standard curve were diluted (1:25) with the same
MS:MS_COMMENTS                   	extraction solvent minus the internal standards. The quantification was
MS:MS_COMMENTS                   	performed using class-based internal standards and in the case of those ceramide
MS:MS_COMMENTS                   	species without an authentic standard in the standard curve mix, we used the
MS:MS_COMMENTS                   	closest related structure. The standard curve mixture contained: Glucosyl (beta)
MS:MS_COMMENTS                   	C12 ceramide, Lactosyl (beta)) C12 ceramide, C18 ceramide (D18:1/18:1), C18:1
MS:MS_COMMENTS                   	dihydroceramide (d18:0/18:1(9Z)) and was run at the following levels (all in
MS:MS_COMMENTS                   	ppb): 100, 80, 60, 50, 40, 30, 20, 10 for the C12 standards and 10, 8, 6, 5, 4,
MS:MS_COMMENTS                   	3, 2,1 for all C18 standards.
#MS_METABOLITE_DATA
MS_METABOLITE_DATA:UNITS	ng/ml
MS_METABOLITE_DATA_START
Samples	SCr-D1	KD-D1	SCr-D2	KD-D2	SCr-D3	KD-D3
Factors	Treatment:Scrambled | Types:Control	Treatment:UGCG-knockdown | Types:Test	Treatment:Scrambled | Types:Control	Treatment:UGCG-knockdown | Types:Test	Treatment:Scrambled | Types:Control	Treatment:UGCG-knockdown | Types:Test
Cer(d18:1/18:1(9Z))	165.5497765	149.3901143	110.8672349	116.9300258	137.3496363	140.3680522
Cer(d18:1/12:0)	1.502376703	1.52260334	1.202910099	1.091365795	1.777951429	1.481896423
Cer(d18:1/14:0)	29.55489419	27.56669985	22.40388412	20.36479389	35.17247527	27.66640244
Cer(d18:1/16:0)	928.7356992	599.9810567	615.3534801	531.9532258	806.7984829	603.5228981
Cer(d18:1/18:0)	82.40383717	70.5810598	56.097338	40.7137742	73.55688026	42.20913603
Cer(d18:1/20:0)	52.07999865	44.52437377	35.45021951	21.87486606	39.86094705	26.49451417
Cer(d18:1/22:0)	271.5150051	248.2854708	191.7708947	139.4624282	211.4898898	202.6828705
Cer(d18:1/24:0)	602.3973041	438.4527772	373.086957	299.4081292	354.8420076	345.918128
Cer(d18:1/25:0)	7.368100413	6.806342868	6.811688153	6.085509264	6.592420736	6.347876289
Cer(d18:1/26:0)	35.5032941	35.08529927	29.42685128	19.96978429	33.46049494	27.67976419
Cer(d18:1/24:1)	245.1306557	230.5961753	187.8576079	114.2104909	224.5639202	210.1499233
Cer(d18:1/26:1)	6.973761754	7.687478744	7.054747898	7.483367857	5.19679129	7.318350182
HexCer(d18:1/12:0)	2.866755659	3.154303461	1.892208403	1.817797824	3.356721746	2.39851355
HexCer(d18:1/16:0)	1306.352186	1719.209883	1320.078348	1053.910325	1247.886116	1079.815391
HexCer(d18:1/18:0)	45.09884784	52.47159172	34.37667881	31.13068897	39.27826337	33.72610896
HexCer(d18:1/20:0)	85.12438836	109.6836897	76.57171302	67.56169209	74.39699971	52.68674862
HexCer(d18:1/22:0)	618.6237387	812.4503969	598.880169	593.1030174	648.0982202	477.5298368
HexCer(d18:1/23:0)	61.48994593	41.02773658	39.10235178	24.66569068	46.03994935	35.89060192
HexCer(d18:1/24:0)	1496.247555	1202.910019	1273.036397	770.3801448	1060.821615	847.5158402
HexCer(d18:1/24:1)	1003.649252	937.0698414	868.8034849	738.9238022	1059.996306	588.1125305
diHexCer(d18:1/12:0)	2.051358075	2.520561894	1.496249475	1.580361586	2.520422924	1.886980405
diHexCer(d18:1/14:0)	66.60393874	72.8291762	53.79193036	60.20379634	76.72191234	66.9185382
diHexCer(d18:1/16:0)	1410.557494	2423.481918	1163.653657	1365.371295	1337.2141	1531.257181
diHexCer(d18:1/18:0)	78.33555212	73.56516642	39.38482443	48.61082201	58.75182398	45.36558185
diHexCer(d18:1/20:0)	174.746267	316.5376174	131.9687709	142.1335085	149.1409446	153.0217957
MS_METABOLITE_DATA_END
#METABOLITES
METABOLITES_START
metabolite_name	PubChem ID	KEGG ID
Cer(d18:1/18:1(9Z))
Cer(d18:1/12:0)
Cer(d18:1/14:0)
Cer(d18:1/16:0)
Cer(d18:1/18:0)
Cer(d18:1/20:0)
Cer(d18:1/22:0)
Cer(d18:1/24:0)
Cer(d18:1/25:0)
Cer(d18:1/26:0)
Cer(d18:1/24:1)
Cer(d18:1/26:1)
HexCer(d18:1/12:0)
HexCer(d18:1/16:0)
HexCer(d18:1/18:0)
HexCer(d18:1/20:0)
HexCer(d18:1/22:0)
HexCer(d18:1/23:0)
HexCer(d18:1/24:0)
HexCer(d18:1/24:1)
diHexCer(d18:1/12:0)
diHexCer(d18:1/14:0)
diHexCer(d18:1/16:0)
diHexCer(d18:1/18:0)
diHexCer(d18:1/20:0)
METABOLITES_END
#END