title: Isolation and structure of providencin: a highly oxygenated diterpene possessing a unique bicyclo[12.2.0]hexadecane ring system from the sea plume Pseudopterogorgia kallos.
abstract: [structure: see text] Providencin (1) is a naturally occurring cytotoxin isolated from the Caribbean gorgonian octocoral Pseudopterogorgia kallos. Its highly oxygenated hexacyclic structure is based on a previously undescribed bicyclo[12.2.0]hexadecane ring system and was established through spectroscopic analysis and X-ray crystallographic analysis. Providencin (1) was shown to exhibit modest anticancer activity against human breast (MCF7), lung (NCI-H460), and CNS (SF-268) cancer cell lines.
authors.affiliation: Department of Chemistry, University of Puerto Rico, P.O. Box 23346, U.P.R. Station, San Juan, Puerto Rico 00931-3346.
authors.forename: Jeffrey
authors.initials: J
authors.lastname: Marrero
authors.forename: Abimael D
authors.initials: AD
authors.lastname: Rodríguez
authors.forename: Peter
authors.initials: P
authors.lastname: Baran
authors.forename: Raphael G
authors.initials: RG
authors.lastname: Raptis
mesh_terms: D037421:Anthozoa / Q000737:chemistry; D000970:Antineoplastic Agents / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D018360:Crystallography, X-Ray; D004224:Diterpenes / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D004354:Drug Screening Assays, Antitumor; D006801:Humans; D015394:Molecular Structure; D014407:Tumor Cells, Cultured
chemical_list: D000970:Antineoplastic Agents; D004224:Diterpenes; C478991:providencin