Ethyl 3-{[(2-chlorophenyl)sulfonyl]imino}-2-{[(3,5-dimethoxyphenyl)amino]carbonyl}-3-(methylsulfanyl)propanoate

The title compound, C21H23ClN2O7S2, is a representative of moderately active hydroxy­acid synthase inhibitors. The structure has a sulfonyl­imine bond [—N=C(—SMe)—CH] and not sulfonyl­amino [—NH—C(—SMe)=C], contrary to expectations. There is a strong intramolecular hydrogen bond between the imine H and the acid carbonyl group, and a weaker one between the imine carbonyl group and a benzene H atom.