2,7-(Epoxy[1,11,13]pentadecatrienoimino)naphtho[2,1-b]furan-1,11(2H)-dione, 21-(acetyloxy)-5,6,9,17,19-pentahydroxy-23-methoxy-2,4,12,16,18,20,22-heptamethyl-8-[2-methyl-1-[methyl[(tetrahydro-2-furanyl)methyl]amino]-2-[(tetrahydro-2-furanyl)methyl]hydrazino]-, (2S,16S,17S,18R,19R,20R,21S,22R,23S)- AIDS-113946 AIDS113946 Rifamycin der.