(2S,16S,17S,18R,19R,20R,21S,22R,23S)-8-{[(4-Benzyl-3,5-dimethyl-1-piperazinyl)imino]methyl}-5,6,9,17,19-pentahydroxy-23-methoxy-2,4,12,16,18,20,22-heptamethyl-1,11-dioxo-1,2-dihydro-2,7-(epoxy[1,11,13]pentadecatrienoimino)naphtho[2,1-b]furan-21-yl acetate AIDS-009577 AIDS009577 NSC212550 Rifampicin analogs