Rifaximin EP Impurity B CAT No: SZ-R027003 CAS No: 13929-35-6 Mol.F. : C39H49NO14 Mol.Wt. : 755.8 Inv. Status: Limited Stock Rel. CAT No : SZ-R058002, SZ-R027003 CAS No:13929-35-6 Mol.F.: C39H49NO14 Mol.Wt.: 755.8 Inv. Status: Limited Stock