Biscembranoids from Vietnamese marine sponge Petrosia nigricans

Ngo Van Quang, Nguyen Xuan Nhiem, Dan Thi Thuy Hang, Hoang Le Tuan Anh, Pham Hai Yen, Duong Thi Dung, Nguyen Thi Cuc, Chau Van Minh, Nguyen Thi Mai Phuong, Phan Van Kiem

Abstract


Three biscembranoids, lobophytone H (1), lobophytone U (2), and methyl tortuoate B (3), were isolated from the methanol extract of Vietnamese marine sponge Petrosia nigricans. Their structures were determinated on the basis of 1D and 2D-NMR, HR-ESI-MS and in comparison with the reported data.


Keywords


Petrosia nigricans, biscembranoids

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