SPL Set ID: b2ff9c56-ca19-48ca-bd08-4b33edb13a08

Mupirocin Ointment USP, 2% contains the RNA synthetase inhibitor antibacterial, mupirocin. The chemical name is ( E )-(2 S ,3 R ,4 R ,5 S )-5-[(2 S ,3 S ,4 S ,5 S )-2,3-epoxy-5-hydroxy-4-methylhexyl] tetrahydro-3,4-dihydroxy-β-methyl-2 H -pyran-2-crotonic acid, ester with 9-hydroxynonanoic acid. The molecular formula of mupirocin is C 26 H 44 O 9 , and the molecular weight is 500.6. The structural formula of mupirocin is: Figure 1. Structure of Murpirocin Each gram of Mupirocin Ointment USP, 2% contains 20 mg mupirocin in a water-miscible ointment base (polyethylene glycol ointment, NF) consisting of polyethylene glycol 400 and polyethylene glycol 3350. Image 1