(3S,4aS,8aS)-2-{(2R)-2-[(11S,14S)-14-(2-Amino-2-oxoethyl)-13,16-dioxo-3,4,11,12,13,14,15,16-octahydro-2H,10H-6,9-ethenonaphtho[2,3-b][1,15,5,8]dioxadiazacyclooctadecin-11-yl]-2-hydroxyethyl}-N-(tert-butyl)decahydroisoquinoline-3-carboxamide 2-Npth-Asn-Phe-psi [CH(O)CH2]-DIQ-NH-tBu 18-member macrocyclic AIDS-059186 AIDS059186