Chemical Formula: C54H82N18O21S2

Bleomycin A2-a

2-[2-(2-{[(2r,3s)-2-{[(2r,3s,4s)-4-{[(2s,3s)-2-[({2-[(1s)-1-{[(2r)-2-amino-2-(c-hydroxycarbonimidoyl)ethyl]amino}-2-(c-hydroxycarbonimidoyl)ethyl]-6-imino-5-methyl-1h-pyrimidin-4-yl}(hydroxy)methylidene)amino]-3-{[(2r,3r,4r,5s,6s)-3-{[(2s,3r,4r,5r,6r)-3,5-dihydroxy-4-(c-hydroxycarbonimidoyloxy)-6-(hydroxymethyl)oxan-2-yl]oxy}-4,5-dihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy}-1-hydroxy-3-(3h-imidazol-4-yl)propylidene]amino}-1,3-dihydroxy-2-methylpentylidene]amino}-1,3-dihydroxybutylidene]amino}ethyl)-1,3-thiazol-4-yl]-n-(4-aminobutyl)-1,3-thiazole-4-carboximidic acid