Bacitracin - API (IP); N-[[(4R)-2-[(1S,2S)-1-Amino-2-methylbutyl]-4,5-dihydro-4-thiazolyl]carbonyl]-L-leucyl-D-α-glutamyl-L-isoleucyl-L-lysyl-D-ornithyl-L-isoleucyl-D-phenylalanyl-L-histidyl-D-α-aspartyl-L-asparagine (10→4)-Lactam;Altracin; Ayfivin; Baciguent; Bacillichin; Bacilliquin; Fortracin; Parentracin; Penitracin; Topitracin; Tropitracin; Zutracin (USP)