abstract |
(57) [Abstract] [Purpose] To provide and use an intermediate for economically producing cephalosporin derivatives. ## STR1 ## Formula (I): (6R, 7R) -7-{[2- (2-amino-4- Thiazolyl)]-2-oxoacetamide} -3- (1,2, 3-Thiadiazol-5-yl) thiomethyl-3-cephem-4-carboxylic acid nitrate. |