2-(4-Chloro-benzoylamino)-5-ethoxycarbonylmethyl-4-methyl-thiophene-3-carboxylic acid ethyl ester

2,3-dicyano-3-methyl-adipic acid diethyl ester

2,3-dicyano-3-methyl-pentane-1,2,5-tricarboxylic acid triethyl ester