MassBank Record: AU240160

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Prednisone; LC-ESI-QTOF; MS2; CE: 40 eV; R=35000; [M-H]-
Mass Spectrum
Chemical Structure
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ACCESSION: AU240160
RECORD_TITLE: Prednisone; LC-ESI-QTOF; MS2; CE: 40 eV; R=35000; [M-H]-
DATE: 2019.03.29
AUTHORS: Nikiforos Alygizakis, Katerina Galani, Nikolaos Thomaidis, University of Athens
LICENSE: CC BY
COPYRIGHT: Copyright (C) 2019 Department of Chemistry, University of Athens
COMMENT: CONFIDENCE standard compound
COMMENT: INTERNAL_ID 2401

CH$NAME: Prednisone CH$NAME: (8S,9S,10R,13S,14S,17R)-17-hydroxy-17-(2-hydroxyacetyl)-10,13-dimethyl-6,7,8,9,12,14,15,16-octahydrocyclopenta[a]phenanthrene-3,11-dione CH$COMPOUND_CLASS: N/A; Environmental Standard CH$FORMULA: C21H26O5 CH$EXACT_MASS: 358.1780239 CH$SMILES: [H][C@@]12CC[C@](O)(C(=O)CO)[C@@]1(C)CC(=O)[C@@]1([H])[C@@]2([H])CCC2=CC(=O)C=C[C@]12C CH$IUPAC: InChI=1S/C21H26O5/c1-19-7-5-13(23)9-12(19)3-4-14-15-6-8-21(26,17(25)11-22)20(15,2)10-16(24)18(14)19/h5,7,9,14-15,18,22,26H,3-4,6,8,10-11H2,1-2H3/t14-,15-,18+,19-,20-,21-/m0/s1 CH$LINK: CAS 53-03-2 CH$LINK: CHEBI 8382 CH$LINK: KEGG C07370 CH$LINK: LIPIDMAPS LMST02030180 CH$LINK: PUBCHEM CID:5865 CH$LINK: INCHIKEY XOFYZVNMUHMLCC-ZPOLXVRWSA-N CH$LINK: CHEMSPIDER 5656 CH$LINK: COMPTOX DTXSID4021185
AC$INSTRUMENT: Bruker maXis Impact AC$INSTRUMENT_TYPE: LC-ESI-QTOF AC$MASS_SPECTROMETRY: MS_TYPE MS2 AC$MASS_SPECTROMETRY: ION_MODE NEGATIVE AC$MASS_SPECTROMETRY: IONIZATION ESI AC$MASS_SPECTROMETRY: FRAGMENTATION_MODE CID AC$MASS_SPECTROMETRY: COLLISION_ENERGY 40 eV AC$MASS_SPECTROMETRY: RESOLUTION 35000 AC$CHROMATOGRAPHY: COLUMN_NAME Acclaim RSLC C18 2.2um, 2.1x100mm, Thermo AC$CHROMATOGRAPHY: FLOW_GRADIENT 99/1 at 0-1 min, 61/39 at 3 min, 0.1/99.9 at 14-16 min, 99/1 at 16.1-20 min AC$CHROMATOGRAPHY: FLOW_RATE 200 uL/min at 0-3 min, 400 uL/min at 14 min, 480 uL/min at 16-19 min, 200 uL/min at 19.1-20 min AC$CHROMATOGRAPHY: RETENTION_TIME 7.148 min AC$CHROMATOGRAPHY: SOLVENT A 90:10 water:methanol with 5mM ammonium acetate AC$CHROMATOGRAPHY: SOLVENT B methanol with 5mM ammonium acetate
MS$FOCUSED_ION: BASE_PEAK 393.1451 MS$FOCUSED_ION: PRECURSOR_M/Z 357.1707 MS$FOCUSED_ION: PRECURSOR_TYPE [M-H]- MS$DATA_PROCESSING: RECALIBRATE identity on assigned fragments and MS1 MS$DATA_PROCESSING: WHOLE RMassBank 2.10.0
PK$SPLASH: splash10-0002-0900000000-f9fbc5ec934dcb48f24f PK$ANNOTATION: m/z tentative_formula formula_count mass error(ppm) 123.0441 C7H7O2- 1 123.0452 -8.65 149.0599 C9H9O2- 1 149.0608 -6.13 PK$NUM_PEAK: 2 PK$PEAK: m/z int. rel.int. 123.0441 328 405 149.0599 808 999 //