100239-45-0Relevant articles and documents
Method of producing tibolone metabolites by fermentation with Rhizopus stolonifer
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Page/Page column 12, (2012/04/10)
A new method of producing metabolites of tibolone comprising fermenting tibolone with Rhizopus stolonifer (ATCC 12938) resulting in the formation of Δ4-Tibolone (C21H28O2), 6β-Hydroxytibolone, and 15β-Hydroxytibolone (C21H28O3) is reported.
Liquid chromatography-mass spectrometry (LC-MS) of steroid hormone metabolites and its applications
Penning, Trevor M.,Lee, Seon-Hwa,Jin, Yi,Gutierrez, Alejandro,Blair, Ian A.
experimental part, p. 546 - 555 (2011/12/02)
Advances in liquid chromatography-mass spectrometry (LC-MS) can be used to measure steroid hormone metabolites in vitro and in vivo. We find that LC-electrospray ionization (ESI)-MS using a LCQ ion trap mass spectrometer in the negative ion mode can be used to monitor the product profile that results from 5α-dihydrotestosterone (DHT)-17β-glucuronide, DHT-17β-sulfate, and tibolone-17β-sulfate reduction catalyzed by human members of the aldo-keto reductase (AKR) 1C subfamily and assign kinetic constants to these reactions. We also developed a stable isotope dilution LC-electron capture atmospheric pressure chemical ionization (ECAPCI)-MS method for the quantitative analysis of estrone (E1) and its metabolites as pentafluorobenzyl (PFB) derivatives in human plasma in the attomole range. The limit of detection for E1-PFB was 740. attomole on column. Separations can be performed using normal-phase LC because ionization takes place in the gas phase rather than in solution. This permits efficient separation of the regioisomeric 2- and 4-methoxy-E1. The method was validated for the simultaneous analysis of plasma E2 and its metabolites: 2-methoxy-E2, 4-methoxy-E2, 16α-hydroxy-E2, estrone (E1), 2-methoxy-E1, 4-methoxy-EI, and 16α-hydroxy-E1 from 5. pg/mL to 2000. pg/mL. Our LC-MS methods have sufficient sensitivity to detect steroid hormone levels in prostate and breast tumors and should aid their molecular diagnosis and treatment.
Stereochemical analysis of the 3α- and 3β-hydroxy metabolites of tibolone through NMR and quantum-chemical investigations. An experimental test of GIAO calculations
Colombo, Diego,Ferraboschi, Patrizia,Ronchetti, Fiamma,Toma, Lucio
, p. 581 - 588 (2007/10/03)
The configuration at C-3 of the 3α- and 3β-hydroxy metabolites of tibolone was studied by extensive application of one- and two-dimensional 1H and 13C NMR spectroscopy combined with molecular modeling performed at the B3LYP/6-31G(d)