5-(4-Chloro­phen­oxy)-6-isopropyl-3-phenyl-3H-1,2,3-triazolo[4,5-d]pyrimidin-7(6H)-one

In the title compound, C(19)H(16)ClN(5)O(2), the triazolopyrimidine ring system is essentially planar, with a maximum displacement of 0.021 (4) Å, and forms dihedral angles of 1.09 (9) and 87.74 (9)° with the phenyl and benzene rings, respectively. Short intra­molecular C—H⋯O and C—H⋯N hydrogen-bonding inter­actions occur within the molecule. In the crystal structure, mol­ecules are linked by inter­molecular C—H⋯O hydrogen bonds into chains parallel to the b axis. In addition, π–π stacking inter­actions involving the triazole and pyrimidine rings of adjacent mol­ecules are observed, with centroid–centroid distances of 3.600 (3) Å.