8,8-Dimethyl-4-(propan-2-yl)-5-oxa-10-azadispiro[2.2.3^{6}.2^{3}]undecane

8,8-Dimethyl-4-(propan-2-yl)-5-oxa-12-azadispiro[2.2.5^{6}.2^{3}]tridecane

8,8-Dimethyl-4-(propan-2-yl)-5-oxa-11-azadispiro[2.2.4^{6}.2^{3}]dodecane

N-[11-(methylsulfanyl)-3,12-dithia-5,10-diazatricyclo[7.3.0.0^{2,6}]dodeca-1(9),2(6),4,7,10-pentaen-4-yl]-4,6-dioxa-10-thia-12-azatricyclo[7.3.0.0^{3,7}]dodeca-1(9),2,7,11-tetraen-11-amine

N-{11-methyl-3,10-dithia-5,12-diazatricyclo[7.3.0.0^{2,6}]dodeca-1(9),2(6),4,7,11-pentaen-4-yl}-10,13-dioxa-4-thia-6-azatricyclo[7.4.0.0^{3,7}]trideca-1,3(7),5,8-tetraen-5-amine

N-(benzo[d]thiazol-2-yl)-2-((2,6,8-trimethyl-5,7-dioxo-5,6,7,8-tetrahydropyrimido[4,5-d]pyrimidin-4-yl)thio)acetamide

2-((2-ethyl-6,8-dimethyl-5,7-dioxo-5,6,7,8-tetrahydropyrimido[4,5-d]pyrimidin-4-yl)thio)-N-(naphthalen-1-yl)acetamide

N-(2,3-dihydrobenzo[b][1,4]dioxin-6-yl)-2-((2-ethyl-6,8-dimethyl-5,7-dioxo-5,6,7,8-tetrahydropyrimido[4,5-d]pyrimidin-4-yl)thio)acetamide

N-(2-chloro-5-(trifluoromethyl)phenyl)-2-((2-ethyl-6,8-dimethyl-5,7-dioxo-5,6,7,8-tetrahydropyrimido[4,5-d]pyrimidin-4-yl)thio)acetamide

2-((2-ethyl-6,8-dimethyl-5,7-dioxo-5,6,7,8-tetrahydropyrimido[4,5-d]pyrimidin-4-yl)thio)-N-(4-nitrophenyl)acetamide

2-((6,8-dimethyl-5,7-dioxo-2-propyl-5,6,7,8-tetrahydropyrimido[4,5-d]pyrimidin-4-yl)thio)-N-(2,3-dimethylphenyl)acetamide

2-((6,8-dimethyl-5,7-dioxo-2-propyl-5,6,7,8-tetrahydropyrimido[4,5-d]pyrimidin-4-yl)thio)-N-(2,5-dimethylphenyl)acetamide

2-((6,8-dimethyl-5,7-dioxo-2-propyl-5,6,7,8-tetrahydropyrimido[4,5-d]pyrimidin-4-yl)thio)-N-(2,4-dimethylphenyl)acetamide