Bioactive briarane diterpenoids from the South China Sea gorgonian Dichotella gemmacea.
Six new briarane diterpenoids, gemmacolides T-Y (1-6), were isolated together with three known analogs, juncenolide J (7), praelolide (8), and junceellolide C (9), from the South China Sea gorgonian Dichotella gemmacea. The structures of the new compounds were elucidated by detailed spectroscopic analysis and comparison with reported data. The absolute configuration was suggested based on biosynthetic considerations. In an in vitro bioassay, compounds 3 and 6 showed potent growth inhibition towards tumor cell lines of A549 and MG63, being stronger than the positive control of adriamycin. These compounds also exhibited weak antimicrobial activity against the bacterium Escherichia coli and the fungi Microbotryum violaceum and Septoria tritici.
Research Center for Marine Drugs, School of Pharmacy, Second Military Medical University, 325 Guo-He Road, Shanghai 200433, PR China.
Cui
C
Li
Ming-Ping
MP
La
Hua
H
Tang
Wei-Hua
WH
Pan
Peng
P
Sun
Karsten
K
Krohn
Yang-Hua
YH
Yi
Ling
L
Li
Wen
W
Zhang
D000818:Animals; D037421:Anthozoa / Q000737:chemistry*; D000890:Anti-Infective Agents / Q000737:chemistry* / Q000302:isolation & purification / Q000494:pharmacology; D017209:Apoptosis / Q000187:drug effects; D045744:Cell Line, Tumor; D002681:China; D004224:Diterpenes / Q000737:chemistry* / Q000302:isolation & purification / Q000494:pharmacology; D004926:Escherichia coli / Q000187:drug effects; D005658:Fungi / Q000187:drug effects; D006576:Heterocyclic Compounds, 4 or More Rings / Q000737:chemistry* / Q000302:isolation & purification / Q000494:pharmacology; D006801:Humans; D009682:Magnetic Resonance Spectroscopy; D008968:Molecular Conformation; D009792:Oceans and Seas
D000890:Anti-Infective Agents; D004224:Diterpenes; D006576:Heterocyclic Compounds, 4 or More Rings; C575710:gemmacolide V; C575711:gemmacolide X