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Verticillane-Type Diterpenoids and an Eudesmanolide-Type Sesquiterpene from the Formosan Soft Coral Cespitularia hypotentaculata

✍ Scribed by Yu-Chi Lin; Mohamed H. Abd El-Razek; Ya-Ching Shen

Publisher
John Wiley and Sons
Year
2010
Tongue
German
Weight
184 KB
Volume
93
Category
Article
ISSN
0018-019X

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✦ Synopsis

Abstract

Four new diterpenes, cespihypotins W–Z (1–4), having the verticillane skeleton and characterized by an α,β‐unsaturated γ‐hydroxycyclopentanone moiety, and a new eudesmanolide‐type sesquiterpene, cespilactam A (5), containing an α,β‐unsaturated γ‐lactam residue, were isolated from the AcOEt‐soluble fraction of the Taiwanese soft coral Cespitularia hypotentaculata. The structure and relative configuration of these metabolites was elucidated through extensive interpretation of MS, COSY, HSQC, HMBC, and NOESY experiments and by comparison of their NMR data with those of related compounds.

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## Abstract Investigation of the MeOH/CH~2~Cl~2~ extract of the soft coral __Cespitularia hypotentaculata__ collected in Taiwan has resulted in the isolation of four new verticillane‐type diterpenoids, cespihypotins M–P (**1**–**4**). Compounds **2** and **3** are C(20)‐epimers. Compound **4** with