Molecules of 4-amino-2-chloro-6,7-dimethoxyquinazoline, C10H10ClN3O2.C
H4O, form base-paired N-H...N hydrogen-bonded dimers in the solid stat
e with N...N = 3.088(2) Angstrom. The quinazoline moieties are each fl
anked by a methanol molecule via N...H-O hydrogen bonding [N...O = 2.8
87(2) Angstrom].