MassBank Record: EQ324351



 Prednisone; LC-ESI-QFT; MS2; CE: 15; R=35000; [M-H]- 
Mass Spectrum
Chemical Structure
Generated by the Chemistry Development Kit (http://github.com/cdk) \n

ACCESSION: EQ324351
RECORD_TITLE: Prednisone; LC-ESI-QFT; MS2; CE: 15; R=35000; [M-H]-
DATE: 2015.08.25
AUTHORS: Beck BDepartment of Environmental Chemistry, Eawag, Stravs MDepartment of Environmental Chemistry, Eawag, Schymanski EDepartment of Environmental Chemistry, Eawag, Singer HDepartment of Environmental Chemistry, Eawag, Department of Environmental Chemistry, Eawag
LICENSE: CC BY
COPYRIGHT: Copyright (C) 2015 Eawag, Duebendorf, Switzerland
COMMENT: CONFIDENCE standard compound
COMMENT: EAWAG_UCHEM_ID 3243

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$EXACT_MASS: 358.17802 CH$SMILES: O=C(CO)[C@@]3(O)CC[C@H]2[C@@H]4CC\C1=C\C(=O)\C=C/[C@]1(C)[C@H]4C(=O)C[C@@]23C 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$LINK: KEGG C07370 CH$LINK: LIPIDMAPS LMST02030180 CH$LINK: PUBCHEM CID:5865 CH$LINK: INCHIKEY XOFYZVNMUHMLCC-ZPOLXVRWSA-N CH$LINK: CHEMSPIDER 5656 CH$LINK: COMPTOX DTXSID4021185
AC$INSTRUMENT: Q Exactive Orbitrap Thermo Scientific AC$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$MASS_SPECTROMETRY: COLLISION_ENERGY 15 (nominal) AC$MASS_SPECTROMETRY: RESOLUTION 35000 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 7.5 min AC$CHROMATOGRAPHY: SOLVENT A water with 0.1% formic acid AC$CHROMATOGRAPHY: SOLVENT B methanol with 0.1% formic acid
MS$FOCUSED_ION: BASE_PEAK 403.1766 MS$FOCUSED_ION: PRECURSOR_M/Z 357.1707 MS$FOCUSED_ION: PRECURSOR_TYPE [M-H]- MS$DATA_PROCESSING: DEPROFILE Spline MS$DATA_PROCESSING: RECALIBRATE loess on assigned fragments and MS1 MS$DATA_PROCESSING: REANALYZE Peaks with additional N2/O included MS$DATA_PROCESSING: WHOLE RMassBank 1.9.6
PK$SPLASH: splash10-00di-0900000000-1ea12664a8edc235b05c PK$ANNOTATION: m/z tentative_formula formula_count mass error(ppm) 122.0371 C7H6O2- 1 122.0373 -1.87 123.0452 C7H7O2- 1 123.0452 0.3 125.0607 C7H9O2- 1 125.0608 -0.58 137.0606 C8H9O2- 1 137.0608 -1.7 145.0657 C10H9O- 1 145.0659 -1.58 149.0604 C9H9O2- 1 149.0608 -2.84 201.0926 C13H13O2- 1 201.0921 2.27 PK$NUM_PEAK: 7 PK$PEAK: m/z int. rel.int. 122.0371 554.6 7 123.0452 71260.6 999 125.0607 14405.3 201 137.0606 905.3 12 145.0657 726 10 149.0604 1075.7 15 201.0926 3935 55 //

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