PHENANTHRENES AND BIBENZYLS FROM A PLAGIOCHILA SPECIES

Nineteen phenolic compounds consisting of 9,10-dihydrophenanthrenes, a phenanthrene, bibenzyls and bisbibenzyls were isolated from a neotrop ical Plagiochila species. The structures of seven new 9,10-dihydrophen anthrenes, a new phenanthrene, a new bibenzyl and three novel bisbiben zyls of the isoplagiochin-type, including a monochlorinated derivative , together with seven known products, were established by spectroscopi c techniques. (C) 1997 Elsevier Science Ltd.