Diterpenes from Hyalis argentea
1997
Ybarra, M.I. | Borkosky, S.A. | Catalan, C.A.N. | Cerda-Garcia-Rojas, C.M. | Joseph-Nathan, P.
The aerial parts of Hyalis argentea yielded, in addition to four known ent-kaurenes, three known guaianolides and one coumarin, the new (7R)-ent-15-oxokaur-16-en-7-ol-19-oic acid beta-glucopyranosyl ester and three new diterpene lactones which biosynthetically seem to be derived from ent-15-oxokaurenoic acid. The structures were determined mainly by one- and two-dimensional spectroscopy.
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