Biotransformation of tissue-specific hormone tibolone with fungal culture Trichothecium roseum
作者:Syed Adnan Ali Shah、Sadia Sultan、M. Zaimi bin Mohd Noor
DOI:10.1016/j.molstruc.2013.03.046
日期:2013.6
tissue-specific hormone tibolone (1) with Trichotheciumroseum (ATCC 13411) has being carried out for the first time. Two new and three known metabolites 2–6 were isolated from fermentation of tibolone (1) with Trichotheciumroseum and their structures were characterized by 2D NMR spectroscopy and mass spectrometry. The relative stereochemistry of newmetabolites 5 and 6 was deduced by 2D NOESY experiments
Alpha-glucosidase and tyrosinase inhibitors from fungal hydroxylation of tibolone and hydroxytibolones
作者:M. Iqbal Choudhary、S. Adnan Ali Shah、Atta-ur-Rahman、Shamsun-Nahar Khan、Mahmud Tareq Hassan Khan
DOI:10.1016/j.steroids.2010.05.017
日期:2010.12
Sixteen new and one known metabolites 4-20 were obtained by incubation of tibolone (1) and hydroxytibolones (2 and 3) with various fungi. Their structures were elucidated by means of a homo and heteronuclear 2D NMR and by HREI-MS techniques. The relative stereochemistry was deduced by 2D NOESY experiment. Metabolites of tibolone (1) exhibited significant inhibitory activities against alpha-glucosidase and tyrosinase enzymes. Hydroxylations at C-6, C-10, C-11, C-15 positions and alpha,beta-unsaturation at C-1/C-2, C-4/C-5 showed potent inhibitory activities against these enzymes. (C) 2010 Elsevier Inc. All rights reserved.