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. 2009 Dec 17;11(24):5590-3.
doi: 10.1021/ol902223m.

Phorbaketals A, B, and C, sesterterpenoids with a spiroketal of hydrobenzopyran moiety isolated from the marine sponge Phorbas sp

Jung-Rae Rho  1 , Buyng Su Hwang, Chung Ja Sim, Seewon Joung, Hee-Yoon Lee, Hyeon-Jin Kim
Affiliations

Phorbaketals A, B, and C, sesterterpenoids with a spiroketal of hydrobenzopyran moiety isolated from the marine sponge Phorbas sp

Jung-Rae Rho et al. Org Lett. .

Abstract

Three new sesterterpenoids, phorbaketals A (1), B (2), and C (3) which have a spiroketal of the hydrobenzopyran moiety, were isolated from the Korean marine sponge Phorbas sp. Their complete structures were elucidated by spectral and chemical methods. They exhibited moderate cytotoxicity against human colorectal, hepatoma, and lung cancer cell lines. Furthermore, the cultivation of the bacterial fraction from the sponge afforded compound 1.

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