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3'-epi-19-Norafraside, a 19-norcardenolide glycoside with dual linkages between a cardenolide and 4, 6-dideoxy-galactos-2-ulose, and 12β-hydroxycoroglausigenin were newly isolated from the stems of Asclepias curassavica, along with known glycosides and free cardenolides. The structures were determined by spectral and chemical methods.
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Abe et al. (1991) studied this question.
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