O-(E)-1-{1-[(6-chloropyridin-3-yl)methyl]-5-methyl-1H-1,2,3-triazol-4-yl}ethyleneamino O-ethyl O-phenyl phosphorothioate

In the title compound, C19H21ClN5O3PS, the P atom adopts a distorted tetrahedral configuration. In the crystal structure, weak intermolecular C-H center dot center dot center dot N hydrogen bonds link molecules into chains along the c axis and inversion-related C-H center dot center dot center dot S hydrogen bonds join parallel chains, forming a network; weak pi-pi stacking interactions also contribute to the stability of the structure.