(8-Hy-droxy-6-meth-oxy-1-oxo-1 H -isochromen-3-yl)methyl formate: a supra-molecular framework.

In the title compound, C 12 H 10 O 6 , an intra-molecular O-H⋯O hydrogen bond forms an S (6) ring motif. The mol-ecule is essentially planar with an r.m.s. deviation of 0.051 Å for all non-H atoms. In the crystal mol-ecules are linked by C-H⋯O hydrogen bonds and a C-H⋯π inter-action, forming a supra-molecular framework.