Chemical Name: N1-[5-(4-[(5-Aminopentyl)(hydroxy)amino]-4-oxobutanamido)pentyl]-N1-hydroxy-N4-[5-(N-hydroxyacetamido)pentyl]butanediamide methanesulfonate (as per EP) ; Butanediamide, N′-[5-[[4-[[5-(acetylhydroxyamino)pentyl] amino]-1,4-dioxobutyl]hydroxyamino]pentyl]-N-(5-aminopentyl)-N-hydroxy-, monomethanesulfonate (as per USP)