Three isomalabaricane and malabaricane triterpenoids（1-3） were isolated from the sponge Stelletta sp.collected from Weizhou Island,Guangxi Province.The structures of compounds 1-3 were identified mainly by spectrosc...Three isomalabaricane and malabaricane triterpenoids（1-3） were isolated from the sponge Stelletta sp.collected from Weizhou Island,Guangxi Province.The structures of compounds 1-3 were identified mainly by spectroscopic methods and X-ray diffraction analysis.All 1H NMR and 13C NMR signals of compound 1 were assigned for the first time on the basis of HMQC,<sup>1H-<sup>1H COSY and HMBC experiment.Antitumor assay exhibits that compounds 1,2 and 3 have a significant antitumor activity against P388 tumor cell lines with ED50 values 0.01,0.5,1.0 μg/mL,respectively.展开更多
文摘Three isomalabaricane and malabaricane triterpenoids（1-3） were isolated from the sponge Stelletta sp.collected from Weizhou Island,Guangxi Province.The structures of compounds 1-3 were identified mainly by spectroscopic methods and X-ray diffraction analysis.All 1H NMR and 13C NMR signals of compound 1 were assigned for the first time on the basis of HMQC,<sup>1H-<sup>1H COSY and HMBC experiment.Antitumor assay exhibits that compounds 1,2 and 3 have a significant antitumor activity against P388 tumor cell lines with ED50 values 0.01,0.5,1.0 μg/mL,respectively.
