ACCESSION: MSBNK-Eawag-EQ01150655
RECORD_TITLE: 1-Methylxanthine; LC-ESI-QFT; MS2; CE: 75%; 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 11506

CH$NAME: 1-Methylxanthine
CH$NAME: 1-methyl-3,7-dihydropurine-2,6-dione
CH$COMPOUND_CLASS: N/A; Environmental Standard
CH$FORMULA: C₆H₆N₄O₂
CH$EXACT_MASS: 166.0490754
CH$SMILES: CN1C(=O)C2=C(NC1=O)N=CN2
CH$IUPAC: InChI=1S/C6H6N4O2/c1-10-5(11)3-4(8-2-7-3)9-6(10)12/h2H,1H3,(H,7,8)(H,9,12)
CH$LINK: CHEBI 68444
CH$LINK: PUBCHEM CID:80220
CH$LINK: INCHIKEY MVOYJPOZRLFTCP-UHFFFAOYSA-N
CH$LINK: CHEMSPIDER 72464

AC$INSTRUMENT: Exploris 240 Orbitrap Thermo Scientific
AC$INSTRUMENT_TYPE: LC-ESI-QFT
AC$MASS_SPECTROMETRY: MS_TYPE MS2
AC$MASS_SPECTROMETRY: ION_MODE NEGATIVE
AC$MASS_SPECTROMETRY: IONIZATION ESI
AC$MASS_SPECTROMETRY: FRAGMENTATION_MODE HCD
AC$MASS_SPECTROMETRY: COLLISION_ENERGY 75 % (nominal)
AC$MASS_SPECTROMETRY: RESOLUTION 17500
AC$MASS_SPECTROMETRY: MASS_RANGE_M/Z 40-189
AC$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 1.749 min

MS$FOCUSED_ION: BASE_PEAK 165.0418
MS$FOCUSED_ION: PRECURSOR_M/Z 165.0418
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$SPLASH: splash10-0a4i-1900000000-43f9559a52703c392c7c
PK$ANNOTATION: m/z tentative_formula formula_count mass error(ppm)
  53.0145 C2HN2- 1 53.0145 0.18
  65.9986 C3NO- 1 65.9985 0.7
  80.0255 C3H2N3- 1 80.0254 0.91
  106.0284 C4H2N4- 1 106.0285 -1.34
  108.0204 C4H2N3O- 1 108.0203 0.53
  126.031 C4H4N3O2- 1 126.0309 0.64
  165.0418 C6H5N4O2- 1 165.0418 0.01
PK$NUM_PEAK: 7
PK$PEAK: m/z int. rel.int.
  53.0145 81967.7 5
  65.9986 805252.9 51
  80.0255 1550371.1 98
  106.0284 205980.7 13
  108.0204 15688540 999
  126.031 1174194.6 74
  165.0418 3882902 247
//