2-[3-[3-(R)-[[(1,1-Dioxotetrahydro-4H-thiopyranyloxy)carbonyl]amino]-4-phenyl-2(R)-hydroxybutyl]]-N-(1,1-dimethylethyl)decahydro-3-isoqinolinecarboxamide AIDS-006118 AIDS006118 IsoquinCON pyranyl urethane analog