ACCESSION: MSBNK-Eawag-EQ324455
RECORD_TITLE: Betamethasone 21; LC-ESI-QFT; MS2; CE: 75; R=35000; [M-H]-
DATE: 2015.08.25
AUTHORS: Beck B, Stravs M, Schymanski E, Singer H, Department of Environmental Chemistry, Eawag
LICENSE: CC BY
COPYRIGHT: Copyright (C) 2015 Eawag, Duebendorf, Switzerland
COMMENT: CONFIDENCE standard compound
COMMENT: EAWAG_UCHEM_ID 3244
CH$NAME: Betamethasone 21
CH$NAME: [2-[(8S,9R,10S,11S,13S,14S,16S,17R)-9-fluoro-11,17-dihydroxy-10,13,16-trimethyl-3-oxo-6,7,8,11,12,14,15,16-octahydrocyclopenta[a]phenanthren-17-yl]-2-oxoethyl] acetate
CH$COMPOUND_CLASS: N/A; Environmental Standard
CH$FORMULA: C24H31FO6
CH$EXACT_MASS: 434.21047
CH$SMILES: O=C(OCC(=O)[C@]3(O)[C@]2(C[C@H](O)[C@]4(F)[C@@]/1(\C(=C/C(=O)\C=C\1)CC[C@H]4[C@@H]2C[C@@H]3C)C)C)C
CH$IUPAC: InChI=1S/C24H31FO6/c1-13-9-18-17-6-5-15-10-16(27)7-8-21(15,3)23(17,25)19(28)11-22(18,4)24(13,30)20(29)12-31-14(2)26/h7-8,10,13,17-19,28,30H,5-6,9,11-12H2,1-4H3/t13-,17-,18-,19-,21-,22-,23-,24-/m0/s1
CH$LINK: CAS
987-24-6
CH$LINK: KEGG
D01402
CH$LINK: PUBCHEM
CID:443967
CH$LINK: INCHIKEY
AKUJBENLRBOFTD-QZIXMDIESA-N
CH$LINK: CHEMSPIDER
392014
CH$LINK: COMPTOX
DTXSID8022668
AC$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 75 (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$CHROMATOGRAPHY: RETENTION_TIME 10.5 min
AC$CHROMATOGRAPHY: SOLVENT A water with 0.1% formic acid
AC$CHROMATOGRAPHY: SOLVENT B methanol with 0.1% formic acid
MS$FOCUSED_ION: BASE_PEAK 479.2092
MS$FOCUSED_ION: PRECURSOR_M/Z 433.2032
MS$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$SPLASH: splash10-0a4i-9000000000-c6a150ce2a083a1f4e06
PK$ANNOTATION: m/z tentative_formula formula_count mass error(ppm)
59.0138 C2H3O2- 1 59.0139 -0.39
83.0502 C5H7O- 1 83.0502 -0.34
95.0504 C6H7O- 1 95.0502 1.49
99.0451 C5H7O2- 1 99.0452 -1.04
119.0502 C8H7O- 1 119.0502 -0.07
121.0659 C8H9O- 1 121.0659 0.34
133.0659 C9H9O- 1 133.0659 -0.29
147.0817 C10H11O- 1 147.0815 1.17
PK$NUM_PEAK: 8
PK$PEAK: m/z int. rel.int.
59.0138 351633.7 999
83.0502 1094.1 3
95.0504 1265.7 3
99.0451 681.4 1
119.0502 670.4 1
121.0659 1305.2 3
133.0659 1458.2 4
147.0817 1086.9 3
//
