69689-86-7
ethyl 2-(2-tritylaminothiazol-4-yl)-(Z)-2-(tritylhydroxyimino)acetate
→
123201-39-8
diphenylmethyl 7β-[2-(2-tritylaminothiazol-4-yl)-(Z)-2-tritylhydroxyimino]-3-vinyl-3-cephem-4-carboxylate