ACCESSION: MSBNK-Eawag-EQ01150559
RECORD_TITLE: Theophylline; LC-ESI-QFT; MS2; CE: 180%; 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 11505

CH$NAME: Theophylline
CH$NAME: 1,3-dimethyl-7H-purine-2,6-dione
CH$COMPOUND_CLASS: N/A; Environmental Standard
CH$FORMULA: C₇H₈N₄O₂
CH$EXACT_MASS: 180.0647255
CH$SMILES: CN1C2=C(C(=O)N(C1=O)C)NC=N2
CH$IUPAC: InChI=1S/C7H8N4O2/c1-10-5-4(8-3-9-5)6(12)11(2)7(10)13/h3H,1-2H3,(H,8,9)
CH$LINK: CHEBI 28177
CH$LINK: PUBCHEM CID:2153
CH$LINK: INCHIKEY ZFXYFBGIUFBOJW-UHFFFAOYSA-N
CH$LINK: CHEMSPIDER 2068

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$MASS_SPECTROMETRY: COLLISION_ENERGY 180 % (nominal)
AC$MASS_SPECTROMETRY: RESOLUTION 17500
AC$MASS_SPECTROMETRY: MASS_RANGE_M/Z 40-204
AC$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 2.608 min

MS$FOCUSED_ION: BASE_PEAK 179.0574
MS$FOCUSED_ION: PRECURSOR_M/Z 179.0574
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$SPLASH: splash10-014i-9000000000-738abfd89628c1f30b79
PK$ANNOTATION: m/z tentative_formula formula_count mass error(ppm)
  41.9985 CNO- 1 41.9985 -0.69
  55.0301 C2H3N2- 1 55.0302 -0.96
  65.0144 C3HN2- 1 65.0145 -1.18
  65.9985 C3NO- 1 65.9985 -0.22
  67.0302 C3H3N2- 1 67.0302 1.12
  79.0177 C3HN3- 1 79.0176 0.79
  92.0252 C4H2N3- 1 92.0254 -2.52
PK$NUM_PEAK: 7
PK$PEAK: m/z int. rel.int.
  41.9985 1180285.9 330
  55.0301 842901.1 235
  65.0144 457657.1 127
  65.9985 3571871.5 999
  67.0302 318969.2 89
  79.0177 617684.4 172
  92.0252 388371.6 108
//