3,28-Diacet-oxy-29-bromo-betulin

Acta Crystallogr Sect E Struct Rep Online. 2009 Jul 25;65(Pt 8):o1982. doi: 10.1107/S1600536809027640.

Abstract

In the title mol-ecule, C(34)H(53)BrO(4), all the cyclo-hexane rings adopt chair conformations, while the cyclo-pentane ring adopts an envelope conformation. In the crystal, weak inter-molecular C-H⋯O hydrogen bonds link the mol-ecules into corrugated sheets parallel to the ab plane.