2-[[8-[[3-[3-[Cyclopropyl[3-[[(1-methyl-1H-imidazole-4-yl-sulfonyl]amino]phenyl]methyl]-4-hydroxy-2-oxo-2H-pyran-6-yl)pentyl]amino]-1,8-dioxooctyl]methylamino]-ethane sulfonic acid, monosodium salt AIDS-058423 AIDS058423 Pyranone deriv.