| Abstrakt: |
Five new diterpenes, cespihypotins W–Z 1–4, resp. and cespihypotone 5 have been isolated from the AcOEtsoluble fraction of the Formosan soft coral Cespitularia hypotentaculata.Two of them having the norverticillane skeleton, i.e., 1and 2, and the other three, 3–5, possessing a verticillane skeleton. The structures were established as +1βH,7E6β,11βdihydroxynorverticilla418,7diene10,12dione 1, +1βH,7E6βacetoxy11βhydroxynorverticilla418,7diene10,12dione 2, −1βH,7E6βacetoxyverticilla418,7,11triene10,12γlactone 3, +1βH,7E6βacetoxy10hydroxyverticilla418,7,11triene10,12γlactone 4, and +1βH,3Z10βhydroxy6oxoverticilla3,11diene10,12γlactone 5, respectively, on the basis of 1D and 2DNMR spectroscopic analyses. [ABSTRACT FROM AUTHOR] |
Plný text