RFX02: Rifaximin EP Impurity B

RFX02: Rifaximin EP Impurity B

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Rifaximin BP Impurity B ;

Rifamycin B ;

4-O-Carboxymethyl Rifamycin ;

[(1,2-Dihydro-5,6,17,19,21-pentahydroxy-23- methoxy-2,4,12,16,18,20,22-heptamethyl-1,11-dioxo-2,7-(epoxypentadeca[1,11,13]trienimino)naphtho[2,1-b]furan-9-yl)oxy]acetic acid 21-acetate ;

CAS # 13929-35-6 ;

C39H49NO14 ;

MW: 755.8 ;