Absolute configuration of micromelin.

ABSTRACT: The title compound {systematic name: 7-meth-oxy-6-[(1R,2R,5R)-5-methyl-4-oxo-3,6-dioxabicyclo-[3.1.0]hexan-2-yl]-2H-chromen-2-one}, C(15)H(12)O(6), is a coumarin, which was isolated from the roots of Micromelum glanduliferum. There are two mol-ecules in the asymmetric unit with slight differences in bond angles. In both mol-ecules, the furan ring adopts a flattened envelope conformation. In the crystal, mol-ecules are linked by weak C-H?O inter-actions into chains along the a axis. Aromatic ?-? stacking inter-actions with centroid-centroid distances in the range 3.6995?(11)-3.8069?(11)?Å and C?O short contacts [3.030?(2)-3.171?(3)?Å] also occur.

SUBMITTER: Fun HK 

PROVIDER: S-EPMC3151812 | biostudies-other | 2011 Jul

REPOSITORIES: biostudies-other