(2S,16S,17S,18R,19R,20R,21S,22R,23S)-5,6,9,17,19-Pentahydroxy-23-methoxy-2,4,12,16,18,20,22-heptamethyl-8-{[(4-octylhexahydro-1H-1,4-diazepin-1-yl)imino]methyl}-1,11-dioxo-1,2-dihydro-2,7-(epoxy[1,11,13]pentadecatrienoimino)naphtho[2,1-b]furan-21-yl acetate AIDS-009578 AIDS009578 NSC239381 Rifampicin analogs