title: Bioactive norditerpenoids from the soft coral Sinularia gyrosa.
abstract: Chemical investigations of the soft coral Sinularia gyrosa resulted in the isolation of six new norcembranolides, gyrosanolides A-F (1-6), a new norcembrane, gyrosanin A (7), and 11 known norditerpenoids 8-18. The structures of the isolated compounds were elucidated through extensive spectroscopic data and by comparison with reported data in the literature. Compounds 1-3, 7-9, 12, and 13 at concentration of 10microM did not inhibit the COX-2 protein expression, but significantly reduced the levels of the iNOS protein (55.2+/-14.6%, 18.6+/-6.7%, 10.6+/-4.6%, 66.9+/-5.2%, 10.2+/-5.1%, 17.4+/-7.2%, 47.2+/-11.9%, and 56.3+/-5.1%, respectively) by LPS stimulation. Compound 8 showed significant antiviral activity against HCMV (human cytomegalovirus) cells with an IC(50) of 1.9microg/mL.
authors.affiliation: Department of Marine Biotechnology and Resources, National Sun Yat-sen University, Kaohsiung 804, Taiwan.
authors.forename: Shi-Yie
authors.initials: SY
authors.lastname: Cheng
authors.forename: Cheng-Ta
authors.initials: CT
authors.lastname: Chuang
authors.forename: Zhi-Hong
authors.initials: ZH
authors.lastname: Wen
authors.forename: Shang-Kwei
authors.initials: SK
authors.lastname: Wang
authors.forename: Shu-Fen
authors.initials: SF
authors.lastname: Chiou
authors.forename: Chi-Hsin
authors.initials: CH
authors.lastname: Hsu
authors.forename: Chang-Feng
authors.initials: CF
authors.lastname: Dai
authors.forename: Chang-Yih
authors.initials: CY
authors.lastname: Duh
mesh_terms: D000818:Animals; D037421:Anthozoa / Q000737:chemistry*; D004224:Diterpenes / Q000302:isolation & purification* / Q000494:pharmacology; D004354:Drug Screening Assays, Antitumor; D006801:Humans; D011451:Prostaglandin-Endoperoxide Synthases / Q000378:metabolism*
chemical_list: D004224:Diterpenes; D011451:Prostaglandin-Endoperoxide Synthases