Furanosesterterpenes from the marine sponge Ircinia echinata (Keller, 1889)

Do Thi Trang, Duong Thi Dung, Nguyen Xuan Nhiem, Bui Huu Tai, Pham Hai Yen, Hoang Le Tuan Anh, Do Cong Thung, Chau Van Minh, Phan Van Kiem

Abstract


Four furanosesterterpene, (7E,12E,20Z,18β)-variabilin (1), (12E,20Z,18β)-8-hydroxyvariabilin (2), (7E,11E,3β)-3,7,11-trimethyl-14-(furan-3-yl)tetradec-7,11-dienoic acid (3), and furoscalarol (4), and one sterol, 3β-hydroxycholest-5-en-7-one (5) were isolated from the methanol extract of the sponge Ircinia echinata (Keller, 1889). Their structures were elucidated by 1D and 2D-NMR spectra and in comparison with those reported in the literature.

Keywords. Sponge, Ircinia echinata, furanosesterterpene, sterol.


Keywords


Sponge, Ircinia echinata, furanosesterterpene, sterol.

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