2-[3-[3-[[(1,1-Dioxo-3-thietanyloxy)carbonyl]amino]-4-phenyl-2(R)-hydroxybutyl]]-N-(1,1-dimethylethyl)decahydro-3-isoqinolinecarboxamide AIDS-006119 AIDS006119 IsoquinCON thietanyl urethane analog