Excavatolides U-Z, new briarane diterpenes from the gorgonian briareum excavatum
A recent study of the EtOAc extract of the gorgonian Briareum excavatum afforded six new diterpenes of the briarane skeleton, excavatolides U-Z (1-6). The structures and relative stereochemistry of metabolites 1-6 were assigned on the basis of NMR studies and chemical methods. The structure, including the relative configuration of excavatolide U (1), was further confirmed by a single-crystal X-ray analysis. Some of the excavatolides have displayed significant cytotoxicity toward P-388 and HT-29 tumor cells.
Sheu
JH
Department of Marine Resources and Department of Chemistry, National Sun Yat-Sen University, Kaohsiung, Taiwan 804, Republic of China.
Sung
PJ
Su
JH
Wang
GH
Duh
CY
Shen
YC
Chiang
MY
Chen
IT