Experimental

R factor = 0.038; wR factor = 0.100; data-to-parameter ratio = 25.4. In the title compound, C15H10Cl2N2O, the dihedral angle between the mean planes of the phenyl ring and the 10-membered quinazoline ring is 63.3 (4). In the crystal, pairs of weak C—H O interactions link the molecules into centro-symmetric dimers, forming R2 2(10) graph-set ring motifs. In addition, weak – stacking interactions [minimum centroid– centroid separation = 3.6810 (8) Å] are observed, which contribute to the formation of a supramolecular assembly in the packing array. Related literature For general background and the pharmacological propertie