(3-((5-amino-6-chloropyrimidin-4-yl)amino)cyclobutane-1,1-diyl)bis(methylene) dicyclohexanecarboxylate

(3-(6-amino-9H-purin-9-yl)cyclobutane-1,1-diyl)bis(methylene) dicyclohexanecarboxylate

(3-((2-amino-6-chloro-5-((4-chlorophenyl)diazenyl)pyrimidin-4-yl)amino)cyclobutane-1,1-diyl)bis(methylene) dicyclohexanecarboxylate