AIDS-131736 AIDS131736 N-(1,6,8,14a-Tetrahydroxy-6a-methoxy-2-(methoxycarbonyl)-3-methyl-7,9,12,14-tetraoxo-5,6,6a,7,9,12,14,14a-octahydrobenzo[a]naphthacen-11-yl)-6-deoxy-2,4-di-O-methylhexopyranosylamine NSC624488 Streptomyces antibiotic SF-2446-A-1