1'-(dimethylcarbamoyl)ferrocene-1-carboxylic acid is a ferrocene inhibitor of the synthetic exo Diels-Alderase catalytic antibody 13G5, where the (dimethylamino)carbonyl group represents the dienophile and the carboxyl group represents the side chain of the diene. It has a role as an inhibitor. It is a member of ferrocenes and a metallocene. It derives from a hydride of a ferrocene.