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X-ray crystallographic analysis of the title hydro-bromide salt, C(10)H(20)N(+)·Br(-), of (1R,2S,3R,5R,8aR)-3-hydroxy-meth-yl-5-methyl-octa-hydro-indolizine-1,2-diol defines the absolute and relative stereochemistry at the five chiral centres in steviamine, a new class of polyhydroxy-lated indolizidine alkaloid isolated from Stevia rebaudiana (Asteraceae) leaves. In the crystal structure, mol-ecules are linked by inter-molecular O-H⋯Br and N-H⋯Br hydrogen bonds, forming double chains around the twofold screw axes along the b-axis direction. Intra-molecular O-H⋯O inter-actions occur.

Original publication

DOI

10.1107/S1600536809043827

Type

Journal article

Journal

Acta Crystallogr Sect E Struct Rep Online

Publication Date

28/10/2009

Volume

65

Pages

o2904 - o2905