4-Hy­droxy-5-(2-meth­oxy­phen­oxy)-2,2′-bipyrimidin-6(5H)-one dihydrate

The title compound, C(15)H(12)N(4)O(4)·2H(2)O, crystallizes with two independent water mol­ecules in the asymmetric unit. The dihedral angles between the mean planes of the benzene and pyrimidine rings and that of the pyrimidin-4-one ring are 85.1 (9) and 82.1 (1)°, respectively. The mean plane of the pyrimidine ring is twisted by 12.8 (8)° from that of the pyrimidin-4-one ring. The dihedral angles between the benzene ring and the mean planes of the pyrimidine and pyrimidin-4-one rings are 85.1 (9) and 82.1 (1)°, respectively.In the crystal, N–H⋯O, O—H⋯N and O—H⋯O hydrogen bonds involving both water mol­ecules are present; these link the mol­ecules into a two-dimensional network parallel to (010). In addition, weak C—H⋯π and π–π [centroid–centroid distance = 3.6183 (8) Å] inter­actions occur.