Document 0583 DOCN M9590583 TI Cytotoxic ent-kaurene diterpenoids from three Isodon species. DT 9509 AU Sun HD; Lin ZW; Niu FD; Lin LZ; Chai HB; Pezzuto JM; Cordell GA; Laboratory of Phytochemistry, Kunming Institute of Botany,; Academia Sinica, Yunnan Province, P.R. China. SO Phytochemistry. 1995 Jan;38(2):437-42. Unique Identifier : AIDSLINE MED/95290150 AB From Isodon loxothyrsa, one new diterpenoid, loxothyrin A, together with one known diterpenoid, adenolin B, from I.pleiophyllus, three known diterpenoids, coetsoidins A, B and G, and from I. adenoloma, one known diterpenoid, longikaurin F, were isolated. The structure determination of loxothyrin A, and the unambiguous NMR spectral assignments of the known compounds were made by a combination of 1D and 2D NMR techniques and computer modelling calculations. The isolates showed potent cytotoxic activities. DE Antimalarials/CHEMISTRY/ISOLATION & PURIF/PHARMACOLOGY Antineoplastic Agents, Phytogenic/CHEMISTRY/ISOLATION & PURIF/ PHARMACOLOGY Diterpenes/CHEMISTRY/*ISOLATION & PURIF/PHARMACOLOGY HIV-1/ENZYMOLOGY Nuclear Magnetic Resonance Plants/*CHEMISTRY Reverse Transcriptase/ANTAGONISTS & INHIB Support, Non-U.S. Gov't Support, U.S. Gov't, P.H.S. JOURNAL ARTICLE SOURCE: National Library of Medicine. NOTICE: This material may be protected by Copyright Law (Title 17, U.S.Code).