ethyl 6-acetyl-3-cyanopyrazolo[1,5-a]pyrimidine-7-carboxylate

ethyl 3-cyano-7-methyl-6-oxopyrazolo[1,5-a][1,3]diazepine-8-carboxylate

5a-acetyl-6,6a-dicarbethoxy-5a,6a-dihydro-5-methyl-6H-cyclopropa<5a,6a>pyrazolo<1,5-a>pyrimidine-3-carbonitrile

3-[bis(2-methyl-1H-indol-3-yl)methyl]-2-methyl-1H-indole

ethyl 3-(2-methyl-3-indolylmethylene)-2,4-dioxovalerate