Literature DB >> 12576655

A new coumestan from Tephrosia calophylla.

Pennaka Hari Kishore1, Mopuru Vijaya Bhaskar Reddy, Duvvuru Gunasekar, Madugula Marthanda Murthy, Cristelle Caux, Bernard Bodo.   

Abstract

A new coumestan, tephcalostan (1) has been isolated from the whole plant of Tephrosia calophylla BEDD. together with two known flavonoids, 7-O-methylglabranin (2) and kaempferol 3-O-beta-D-glucopyranoside (3). The structure of tephcalostan was elucidated as 5'-(R)-8, 9-methylenedioxy-5'-isopropenyl-4', 5'-dihydrofurano[2', 3':2, 3]coumestan by extensive one-and two-dimensional (1D- and 2D-)-NMR techniques including (1)H-(1)H correlation spectroscopy (COSY), heteronuclear single quantum coherence (HSQC), heteronuclear multiple bond connectivity (HMBC) and nuclear Overhauser enhancement spectroscopy (NOESY) experiments.

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Year:  2003        PMID： 12576655     DOI： 10.1248/cpb.51.194

Source DB:  PubMed          Journal:  Chem Pharm Bull (Tokyo)        ISSN： 0009-2363            Impact factor:   1.645


  7 in total

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  7 in total

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