ABsmm.-Iabriformin 111, a known cardenolide, was isolated from the latex of Asclepias gla.rcrcm. Its identity was established by comparison of the spectroscopic data with those reported. The 13C-nmr spectrum of 1 is presented. T h e major constituents of the latex were identified as a mixture of taraxasterol and JI-taraxasterol acetates.
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