3-Isoquinolinecarboxamide, N-(1,1-dimethylethyl)decahydro-2- [(2R,3R)-2-hydroxy-3-[(3-hydroxy-2-methylbenzoyl)amino]-4-(phenylthio)butyl]-, methanesulfonate (3S,4aS,8aS)- NFV NSC722664 Nelfinavir nelfinavir mesylate viracept