No abstract

No abstract

Chemical examinations of Cleistanthus collinus Roxb., a poisonous tree from India, and Cleistanthus patulus Muell. Arg. have resulted in isolation of a number of arylnaphthalide lignans and their glycosides as well as some furofuranoid lignans. While Cleistanthus gracilis Hook. f. from Thailand afforded an unusual glucoside of 2-b-hydroxy-8-azabicyclo-(5,0,2)-4b, 9b-epoxynona-5,7-diene, C. schlechteri from South Africa was the first reported source of the pimarane diterpenes. Cleistanthin A and cleistanthin B, diphyllin glycosides isolated from C. collinus were reported to exhibit cytotoxicity on several cancer cell lines. Cleistanthin A was found to cause DNA strand breaks and induce apoptosis in cultured cells while cleistanthin B caused G1 arrest and induced apoptosis in mammalian cells.

No abstract

Fasciculatin, a furanosesterterpene isolated from the marine sponge Ircinia variabilis from the Atlantic Coast of Morocco, has been evaluated for its influence on a mitogen-induced proliferation of human lymphocytes and growth of human tumor cell lines.