title: Thorectandrols A and B, new cytotoxic sesterterpenes from the marine sponge Thorectandra species.
abstract: Two new sesterterpenes, thorectandrol A (1) and B (2), were isolated from extracts of the marine sponge Thorectandra sp. The structures were determined by extensive NMR spectral data analysis. NOE correlations were used to define the relative stereochemistry of 1 and 2, while CD data were used to suggest their absolute stereochemistry. Both compounds 1 and 2 inhibited the growth of MALME-3M (melanoma) and MCF-7 (breast) cancer cell lines in the range 30-40 microg/mL. The known compound palauolol (3) was isolated as well and was also cytotoxic.
authors.affiliation: Laboratory of Drug Discovery Research and Development, Center for Cancer Research, National Cancer Institute, Frederick, Maryland 21702-1201, USA.
authors.forename: R D
authors.initials: RD
authors.lastname: Charan
authors.forename: T C
authors.initials: TC
authors.lastname: McKee
authors.forename: M R
authors.initials: MR
authors.lastname: Boyd
mesh_terms: D000818:Animals; D000970:Antineoplastic Agents / Q000737:chemistry* / Q000302:isolation & purification / Q000494:pharmacology*; D002942:Circular Dichroism; D004354:Drug Screening Assays, Antitumor; D006801:Humans; D009682:Magnetic Resonance Spectroscopy; D008968:Molecular Conformation; D011161:Porifera / Q000737:chemistry*; D016339:Spectrometry, Mass, Fast Atom Bombardment; D013729:Terpenes / Q000737:chemistry* / Q000494:pharmacology*; D014407:Tumor Cells, Cultured
chemical_list: D000970:Antineoplastic Agents; D013729:Terpenes; C433961:thorectandrol A; C433962:thorectandrol B