P.L. Majumder

TL;DR: Cirrhopetalanthrin, a new dimeric phenanthrene derivative, was isolated from the orchid maculosum and its structure was deduced from spectral and chemical evidence as discussed by the authors.

TL;DR: From the orchid Cirrhopetalum elatum was isolated a new triterpene of the cycloartane series, which was shown to be 24-methylenecycloartanyl p -hydroxycinnamate from spectral and chemical evidence.

TL;DR: The present study furnishes an overview of the hydroxy or/and methoxy-substituted 9,10-dihydro/phenanthrene, methylated, prenylated and other monomeric derivatives, dimeric and trimeric phenanthrenes and their biological activities.

TL;DR: A compilation of the triterpenoids isolated during the period 1982–1989 along with their occurrence, available physical data, spectroscopy and X-ray analysis used for their characterization, is included.

TL;DR: Moscatilin, a new bibenzyl derivative isolated from the orchid Dendrobium moscatum, was shown to have the structure 4,4′-dihydroxy-3,3′,5-trimethoxybibensyl.

TL;DR: Compounds 1-3 and denthyrsinin (1,5,7-trimethoxyphenanthrene-2,6-diol; 4) showed significant cytotoxic activities against Hela (13.5, 9.5 and 4.8 microM, respectively) cell lines.