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24-norhopene derivatives from Diatenopteryx sorbifolia
J P Chávez1, J M David, S W Yang
1Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago 60612, USA.
Journal of Natural Products
|October 10, 1997
Abstract:
Two new hopene derivatives, 3 beta,6 beta-dihydroxy-21 alpha H-24-norhopa-4(23),22(29)-diene (1) and 3 beta,5 beta-dihydroxy-6 beta-[(4-hydroxybenzoyl)oxy]-21 alpha H-24-norhopa-4(23),22(29)-diene (2), together with cleomiscosin B (3) and 5,6-dimethoxy-7-hydroxycoumarin (umckalin), were isolated from the timber of Diatenopteryx sorbifolia. This is the first isolation of the norhopene skeleton from nature. The structures of the isolates were established by spectroscopic analysis.