Ethyl (Z)-2-chloro-2-(2-phenylhydrazono)acetate;Acetic acid, 2-chloro-2-(2-phenylhydrazinylidene)-, ethyl ester, (2Z); Ethyl (2Z)-2-chloro-2-(2-phenylhydrazinylidene)acetate; (Z)-Ethyl2-chloro-2-(2-phenylhydrazono)acetate