Crystal structure of 2,4-di-amino-5-(4-hy-droxy-3-meth-oxy-phen-yl)-8,8-dimethyl-6-oxo-6,7,8,9-tetra-hydro-5-chromeno[2,3-]pyridine-3-carbo-nitrile-di-methyl-formamide-water (1/1/1).

In the structure of the title compound, CHNO·CHNO·HO, the entire tricyclic system is approximately planar except for the carbon atom bearing the two methyl groups; the meth-oxy-phenyl ring is approximately perpendicular to the tricycle. All seven potential hydrogen-bond donors take part in classical hydrogen bonds. The main mol-ecule and the DMF combine to form broad ribbons parallel to the axis and roughly parallel to the plane; the water mol-ecules connect the residues in the third dimension.