A new glycoside, kusaginin was isolated from Clerodendron trichotomum Thunb. and 2-(3,4-dihydroxyphenyl)ethyl 3-O-α-l-rhamnopyranosyl-4-O-(3,4-dihydroxycinnamoyl)-β-d-glucopyranoside was assigned to this substance from studies on the hydrolysis products and from analyses of the 1H NMR and 13C NMR spectra.
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Sakurai et al. (1983) studied this question.
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