SPL Set ID: 66db1071-024f-aa19-e053-2a91aa0a8e39

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-ß-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: Each gram of mupirocin ointment, 2% contains 20 mg mupirocin in a water-miscible ointment base (polyethylene glycol ointment) consisting of polyethylene glycol 400 and polyethylene glycol 3350. Chemical Structure