8-{3-[4-(4,5-Dihydroxy-6-methyl-tetrahydro-pyran-2-yloxy)-2-hydroxy-5,6-dimethyl-tetrahydro-pyran-2-yl]-2-hydroxy-1-methyl-butyl}-20-hydroxy-9-methoxy-1,3,13-trimethyl-16-pentyl-7,17,19-trioxa-bicyclo[13.4.1]icosa-2,4,10,12-tetraen-6-one AIDS-058653 AIDS058653 Formamicin