Crystal structure of (2-amino-7-methyl-4-oxidopteridine-6-carboxyl­ato-κ(3) O (4),N (5),O (6))aqua­(1,10-phenanthroline-κ(2) N,N′)zinc trihydrate

In the title compound, [Zn(C(8)H(5)N(5)O(3))(C(12)H(8)N(2))(H(2)O)]·3H(2)O, a tridentate 2-amino-7-methyl-4-oxidopteridine-6-carboxyl­ate ligand, a bidentate ancillary 1,10-phenanthroline (phen) ligand and a water mol­ecule complete a distorted octa­hedral coordination geometry around the Zn(II) atom. The pterin ligand forms two chelate rings. The phen and pterin ring systems are nearly perpendicular [dihedral angle = 85.16 (5)°]. Classical N—H⋯O, O—H⋯N and O—H⋯O hydrogen bonds and weak C—H⋯O hydrogen bonds link the complex mol­ecules and lattice water mol­ecules into a three-dimensional network. π–π stacking contacts are observed as well, with centroid-to-centroid distances of 3.5679 (14), 3.7004 (14), 3.6641 (15), 3.6974 (13) and 3.3412 (12) Å.