Enzymatic hydrolysis of galioside (1) and gardenoside (2), epimer of 1 at C-8 position, provided the antimicrobially active aglucone (3) and the inactive 6(a,b), while acid treatment of 2 gave scandoside methylester (8), deacetylasperulosidic acid methylester (9) and 10-dehydogeniposide (10).
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Ishiguro et al. (1983) studied this question.
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