The crystal structure of zwitterionic 2-{[(4-imin­iumyl-3-methyl-1,4-di­hydro­pyridin-1-yl)meth­yl]carbamo­yl}benzoate hemihydrate

The asymmetric unit of the title compound, C(15)H(15)N(3)O(3)·0.5H(2)O, comprises two 2-{[(4-iminiumyl-3-methyl-1,4-di­hydro­pyridin-1-yl)meth­yl]carbamo­yl}benzoate zwitterions (A and B) and a water mol­ecule. The dihedral angles between the pyridine and phenyl rings in the zwitterions are 53.69 (10) and 73.56 (11)° in A and B, respectively. In the crystal, mol­ecules are linked by N—H⋯O, O—H⋯O, C—H⋯O and C—H⋯π(ring) hydrogen bonds into a three-dimensional network. The crystal structure also features π–π inter­actions involving the centroids of the pyridine and phenyl rings [centroid–centroid distances = 3.5618 (12) Å in A and 3.8182 (14) Å in B].