N-(4-Methyl-phen-yl)-N'-phenyl-butane-diamide monohydrate.

In the title hydrate, C(17)H(18)N(2)O(2)·H(2)O, the dihedral angles formed by the aromatic rings of the benzene and methyl-benzene groups with the mean planes of the attached NH-C(O)-CH(2) fragments are 12.6 (4) and 23.3 (3)°, respectively, while that between the two aromatic rings is 73.7 (2)°. In the crystal, the water mol-ecule accepts two and makes two hydrogen bonds. The mol-ecules are packed into layers parallel to (101) by O-H⋯O and N-H⋯O hydrogen-bonding inter-actions.