Synonyms: NSC143470;38128-94-8;]-3-methylbutanoic acid;NSC 143470;NSC-143470;2-((((1E)-(21-(acetyloxy)-5,6,9,17,19-pentahydroxy-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-8-yl)methylene)amino)oxy)-3-methylbutanoic acid;2-[({(1E)-[21-(acetyloxy)-5,6,9,17,19-pentahydroxy-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-8-yl]methylene}amino)oxy