(7R)-7-[(2-Amino-4-thiazolyl)(methoxyimino)acetylamino]-3-[4-formylpyridinium-1-ylmethyl]cepham-3-ene-4-carboxylic acid C??? ??, ??, ??

(7R)-7-[(2-Amino-4-thiazolyl)(methoxyimino)acetylamino]-3-[4-formylpyridinium-1-ylmethyl]cepham-3-ene-4-carboxylic acid ?? ?? ? ???

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(7R)-7-[(2-Amino-4-thiazolyl)(methoxyimino)acetylamino]-3-[4-formylpyridinium-1-ylmethyl]cepham-3-ene-4-carboxylic acid ?? ??