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QUALITY CONTROL CHEMICALS INC.

STANDARD REFERENCE MATERIAL

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Cefoperazone EP Impurity B

(6R,7R)-7-((R)-2-(4-ethyl-2,3-dioxopiperazine-1-carboxamido)-2-(4-hydroxyphenyl)acetamido)-3-((4-methyl-5-thioxo-4,5-dihydro-1H-tetrazol-1-yl)methyl)-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid

QCC Cat No.:	QC061702
CAS No.:	711598-76-4
Mol. Formula:	C25H27N9O8S2
Mol. Weight:	645.67
Warning:	The form of the product salt may be different from the official website, please consult your local agent for details.

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