1 ZYG 9-{hydroxy[(5s,6r)-6-hydroxy-6-{[(1s)-3-{[(3s)-1-hydroxy-2-oxoazepan-3-yl]amino}-1-methyl-3-oxopropyl]oxy}-5-({[(4s)-2-(2-hydroxyphenyl)-4,5-dihydro-1,3-oxazol-4-yl]carbonyl}amino)hexyl]amino}-9-oxononanoic acid 1.000 2 ZYF (9z)-11-{hydroxy[(5s)-6-{[(1s)-3-{[(3s)-1-hydroxy-2-oxoazepan-3-yl]amino}-1-methyl-3-oxopropyl]oxy}-5-({[(4s)-2-(2-hydroxyphenyl)-4,5-dihydro-1,3-oxazol-4-yl]carbonyl}amino)-6-oxohexyl]amino}-11-oxoundec-9-enoic acid 0.893 3 CM1 Carboxymycobactin S 0.767 4 CM2 Carboxymycobactin T 0.750 5 WGR Dideoxymycobactin-838 0.750