ACCESSION: MSBNK-Eawag-EQ324452
RECORD_TITLE: Betamethasone 21; LC-ESI-QFT; MS2; CE: 30; 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$MASS_SPECTROMETRY: COLLISION_ENERGY 30 (nominal)
AC$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$SPLASH: splash10-0a4i-9000000000-978ae4f3a79cdbae3a5c
PK$ANNOTATION: m/z tentative_formula formula_count mass error(ppm)
  59.0138 C2H3O2- 1 59.0139 -0.73
  107.0501 C7H7O- 1 107.0502 -1.48
  121.066 C8H9O- 1 121.0659 1.25
PK$NUM_PEAK: 3
PK$PEAK: m/z int. rel.int.
  59.0138 515466.2 999
  107.0501 741.3 1
  121.066 595.3 1
//