5-Phenyl-2-((2-phenylethyl)thio)-6,7,8,9-tetrahydropyrimido[4,5-b]quinolin-4-amine 5-Phenyl-2-((2-phenylethyl)thio)-6,7,8,9-tetrahydropyrimido[4,5-b]quinolin-4-ylamine AIDS-144464 AIDS144464 NSC667078