6,6′-Diamino-1,1′,3,3′-tetramethyl-5,5′-(4-chlorobenzylidene)bis[pyrimidine-2,4(1H,3H)-dione]

The title compound, C19H21ClN6O4, is a 1:2 adduct of p-chlorobenzaldehyde and uracil. It crystallizes with two molecules in the asymmetric unit. The two uracil units in the same molecule are connected by a pair of strong N—H...O hydrogen bonds. The packing is stabilized by N—H...O, C—H...O and C—H...N interactions.