The molecule is a carboxylic ester-lactam secreted by Mycobacterium tuberculosis which is both lipid- and water-soluble and acts as a siderophore. It has a role as a siderophore. It is a lactam, a member of 1,3-oxazoles, a cyclic hydroxamic acid and a methyl ester.
methyl 7-[hydroxy-[6-[4-[(1-hydroxy-2-oxoazepan-3-yl)amino]-4-oxobutan-2-yl]oxy-5-[[2-(2-hydroxyphenyl)-4,5-dihydro-1,3-oxazole-4-carbonyl]amino]-6-oxohexyl]amino]-7-oxoheptanoate