ethyl 3-oxo-3-(thiazol-2-ylamino)propanoate 、
2-(1-Chloro-2,2-dimethyl-propyl)-8-trifluoromethyl-benzo[d][1,3]oxazin-4-one 以to obtain 15.6 g of ethyl 2-[(2-chloro-1-oxo-3,3-dimethylbutyl)-amino]-β-oxo-α-[(2-thiazolylamino)-carbonyl]-3-(trifluoromethyl)-benzene-propanoate melting at 180° C.的产率得到Ethyl 2-[(2-chloro-1-oxo-3,3-dimethylbutyl)-amino]-β-oxo-α-[(2-thiazolylamino)-carbonyl]-(3-trifluoromethyl)-benzene-propanoate