ACCESSION: MSBNK-Eawag-EQ01154503
RECORD_TITLE: 7-Methylxanthine; LC-ESI-QFT; MS2; CE: 45%; R=17500; [M+H]+
DATE: 2024.05.08
AUTHORS: C. Meyer [dtc], B. Beck [dtc,com], J. Hollender [dtc]
LICENSE: CC BY-SA
COPYRIGHT: Copyright (C) Eawag 2023
PUBLICATION: Meyer, C., Stravs, M., Hollender, J.. How Wastewater Reflects Human Metabolism - Suspect Screening of Pharmaceutical Metabolites in Wastewater Influent. doi:10.1021/acs.est.4c00968
COMMENT: CONFIDENCE standard compound
COMMENT: UCHEM_ID 11545

CH$NAME: 7-Methylxanthine
CH$NAME: 7-methyl-3H-purine-2,6-dione
CH$COMPOUND_CLASS: N/A; Environmental Standard
CH$FORMULA: C₆H₆N₄O₂
CH$EXACT_MASS: 166.0490754
CH$SMILES: CN1C=NC2=C1C(=O)NC(=O)N2
CH$IUPAC: InChI=1S/C6H6N4O2/c1-10-2-7-4-3(10)5(11)9-6(12)8-4/h2H,1H3,(H2,8,9,11,12)
CH$LINK: CHEBI 48991
CH$LINK: PUBCHEM CID:68374
CH$LINK: INCHIKEY PFWLFWPASULGAN-UHFFFAOYSA-N
CH$LINK: CHEMSPIDER 61660

AC$INSTRUMENT: Exploris 240 Orbitrap Thermo Scientific
AC$INSTRUMENT_TYPE: LC-ESI-QFT
AC$MASS_SPECTROMETRY: MS_TYPE MS2
AC$MASS_SPECTROMETRY: ION_MODE POSITIVE
AC$MASS_SPECTROMETRY: IONIZATION ESI
AC$MASS_SPECTROMETRY: FRAGMENTATION_MODE HCD
AC$MASS_SPECTROMETRY: COLLISION_ENERGY 45 % (nominal)
AC$MASS_SPECTROMETRY: RESOLUTION 17500
AC$MASS_SPECTROMETRY: MASS_RANGE_M/Z 40-191
AC$CHROMATOGRAPHY: COLUMN_NAME XBridge C18 3.5um, 2.1x50mm, Waters
AC$CHROMATOGRAPHY: FLOW_GRADIENT 90/10 at 0 min, 50/50 at 4 min, 5/95 at 17 min, 5/95 at 25 min, 90/10 at 25.1 min, 90/10 at 30 min
AC$CHROMATOGRAPHY: FLOW_RATE 200 uL/min
AC$CHROMATOGRAPHY: RETENTION_TIME 1.422 min

MS$FOCUSED_ION: BASE_PEAK 256.9597
MS$FOCUSED_ION: PRECURSOR_M/Z 167.0564
MS$FOCUSED_ION: PRECURSOR_TYPE [M+H]+
MS$DATA_PROCESSING: RECALIBRATE loess on assigned fragments and MS1
MS$DATA_PROCESSING: REANALYZE Peaks with additional N2/O included
MS$DATA_PROCESSING: WHOLE RMassBank 3.15.1

PK$SPLASH: splash10-014i-0900000000-a89a5386f633cf940f50
PK$ANNOTATION: m/z tentative_formula formula_count mass error(ppm)
  124.0505 C5H6N3O+ 1 124.0505 -0.54
  149.0458 C6H5N4O+ 1 149.0458 -0.05
  150.0296 C6H4N3O2+ 1 150.0298 -1.53
  167.0562 C6H7N4O2+ 1 167.0564 -0.65
PK$NUM_PEAK: 4
PK$PEAK: m/z int. rel.int.
  124.0505 3957477 413
  149.0458 70929.9 7
  150.0296 500371.7 52
  167.0562 9559111 999
//