38123-26-1 (2S,16S,17S,18R,19R,20R,21S,22R,23S,24E)-9-[2-(1-butyl-2,2-dipropylhydrazino)-2-oxoethoxy]-5,6,17,19-tetrahydroxy-23-methoxy-2,4,12,16,18,20,22-heptamethyl-1,11-dioxo-1,2-dihydro-2,7-(epoxypentadeca[1,11,13]trienoimino)naphtho[2,1-b]furan-21-yl acetate [3 38123-21-6 (24E)-9-[2-(2,2-diethyl-1-methylhydrazino)-2-oxoethoxy]-5,6,17,19-tetrahydroxy-23-methoxy-2,4,12,16,18,20,22-heptamethyl-1,11-dioxo-1,2-dihydro-2,7-(epoxypentadeca[1,11,13]trienoimino)naphtho[2,1-b]furan-21-yl acetate 38123-35-2 (24E)-5,6,17,19-tetrahydroxy-23-methoxy-2,4,12,16,18,20,22-heptamethyl-9-[2-(1-methyl-2,2-dipropylhydrazino)-2-oxoethoxy]-1,11-dioxo-1,2-dihydro-2,7-(epoxypentadeca[1,11,13]trienoimino)naphtho[2,1-b]furan-21-yl acetate 38123-18-1 (24E)-5,6,17,19-tetrahydroxy-23-methoxy-2,4,12,16,18,20,22-heptamethyl-9-[2-(3-methylmorpholin-4-yl)-2-oxoethoxy]-1,11-dioxo-1,2-dihydro-2,7-(epoxypentadeca[1,11,13]trienoimino)naphtho[2,1-b]furan-21-yl acetate