2,7-(Epoxypentadeca(1,11,13)trienimino)naphtho(2,1-b)furan-1,11(2H)-dione, 5,6,9,17,19,21-hexahydroxy-2,4,12,16,18,20,22-heptamethyl-23-methoxy-8-((4-ethyl1-piperazinylimino)methyl)-,21-acetate 37392-57-7 BRN 5402774 NSC 143482