Methyl 5-[N,N-bis(methoxycarbonylmethyl)amino]-4-cyano-2-methoxycarbonyl-3-thiopheneethanoate

In the title compound, C16H18N2O8S, derived from ranelic acid, there is a highly substituted thiophene ring. The crystal structure involves intermolecular C—H...O and C—H...S hydrogen bonds.