(1R,3R,4R,6S)-4-(7-Meth-oxy-2-oxo-2H-chromen-6-yl)-1-methyl-3,6-dioxa-bicyclo-[3.1.0]hexan-2-yl acetate

Acta Crystallogr Sect E Struct Rep Online. 2012 Dec 1;68(Pt 12):o3421-2. doi: 10.1107/S1600536812047617. Epub 2012 Nov 24.

Abstract

In the title compound, C17H16O7, which was isolated from the leaves of Micromelum integerrimum, the furan ring adopts an envelope conformation with the O atom as the flap. An intra-molecular C-H⋯O hydrogen bond occurs. The carbonyl O atom is disordered in a 0.57 (8):0.43 (8) ratio. In the crystal, mol-ecules are linked by weak C-H⋯O hydrogen bonds into a C(10) chain along [010].