Scheme 7.
Preparation of 28-O-β-D-glucopyranosyl 3β-hydroxy-lup-20(29)-en-28-oate (25) [123]. Reagents and conditions: (i) β-D-glucose, resting-cell suspensions of Cunninghamella species, N,N-dimethyl-formamide, and phosphate buffer (pH 7.2), 216 h.
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