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?? ???? >(7R)-7β-[(2-Aminothiazol-4-yl)(methoxyimino)acetylamino]-3-cyanomethylthiomethylcepham-3-ene-4-carboxylic acid pivaloyloxymethyl ester
(7R)-7β-[(2-Aminothiazol-4-yl)(methoxyimino)acetylamino]-3-cyanomethylthiomethylcepham-3-ene-4-carboxylic acid pivaloyloxymethyl ester
(7R)-7β-[(2-Aminothiazol-4-yl)(methoxyimino)acetylamino]-3-cyanomethylthiomethylcepham-3-ene-4-carboxylic acid pivaloyloxymethyl ester ??
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(7R)-7β-[(2-Aminothiazol-4-yl)(methoxyimino)acetylamino]-3-cyanomethylthiomethylcepham-3-ene-4-carboxylic acid pivaloyloxymethyl ester C??? ??, ??, ??
(7R)-7β-[(2-Aminothiazol-4-yl)(methoxyimino)acetylamino]-3-cyanomethylthiomethylcepham-3-ene-4-carboxylic acid pivaloyloxymethyl ester ?? ?? ? ???
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(7R)-7β-[(2-Aminothiazol-4-yl)(methoxyimino)acetylamino]-3-cyanomethylthiomethylcepham-3-ene-4-carboxylic acid pivaloyloxymethyl ester ?? ??
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