12,20-Dihydroxy-11,19-diisobutyl-5,8-diisopropyl-16-methyl-3,6,9,14,17-pentaoxo-4,7,10,15,18-pentaazadocosan-22-oic acid 60252-35-9 AIDS-128854 AIDS128854 NSC301503 Sodium pe.psi.nostreptin