for the following products
(2R)-2-[[6-[(3-Chlorophenyl)amino]-9-(1-methylethyl)-9h-purin-2-yl]amino]-3-methyl-1-butanol | (R)-2-((6-((3-Chlorophenyl)amino)-9-isopropyl-9H-purin-2-yl)amino)-3-methylbutan-1-ol | 2-(R)-Isopropyl-2-hydroxyethylamino)-6-( 3-chloro-4-carboxyanilino)-9-isopropylpurine and Purvalanol A
