Acta Cryst. (2014). C70, 388-391
[ doi:10.1107/S2053229614003751 ]
Synopsis: Dihydroberberine, a reduced form of pharmacologically important berberine, crystallizes from ethanol without interstitial solvent. Although lacking classical O-H or N-H donors, the packing in the crystalline state is clearly governed by C-HN and C-HO hydrogen bonds involving the two acetal-type C-H bonds of the 1,3-dioxole ring.
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