17555-83-8 2,7-(Epoxypentadeca(1,11,13)trienimino)naphtho(2,1-b)furan-1,11(2H)-dione, 8-(cyclohexylamino)-2,4,12,16,18,20,22-heptamethyl-5,6,9,17,19,21-hexahydroxy-23-methoxy-, 21-acetate 3-(Cyclohexylamino)rifamycin Ba 40866 Ciba 40866 Rifamycin, 3-(cyclohexylamino)- (9CI)