7-(-2-(2-aminothiazol-4-yl)-2-(3-(3-hydroxy-4-pyridon-1-yl)-3-carboxypropoxyimino)acetamido)-3-(1,2,3-thiadiazol-5-yl)-thiomethyl-3-cephem-4-carboxylic acid, 6R-(6alpha,7beta.(Z(R*))) isomer
7-(-2-(2-aminothiazol-4-yl)-2-(3-(3-hydroxy-4-pyridon-1-yl)-3-carboxypropoxyimino)acetamido)-3-(1,2,3-thiadiazol-5-yl)-thiomethyl-3-cephem-4-carboxylic acid, 6r-(6alpha,7beta.(z(r*))) isomer