Butanoic acid, 4-[[(1,1-dimethylethoxy)carbonyl]amino]-, chloromethyl ester CAS:872044-65-0 A1058985 BUTANOIC ACID,4,4,4-TRIFLUORO-3-OXO-2-(2-PHENYLHYDRAZINYLIDENE)-, ETHYL ESTER CAS:1494-98-0 A1000336 |