1-Methyl-3-(4-o-tolyloxy-but-2-ynyloxy)-1H-quinolin-2-one
1,3-dimethyl-6-[methyl-(4-o-tolyloxy-but-2-ynyl)-amino]-1H-pyrimidine-2,4-dione
1,3,8-trimethyl-5-o-tolyloxymethylene-5,6,7,8-tetrahydro-1H-pyrido[2,3-d]pyrimidine-2,4-dione
1,3-dimethyl-5-{N-[4-(2'-methylphenoxy)but-2-ynyl]-N-ethylamino}uracil
1,3-Dimethyl-5-(4-o-tolyloxy-but-2-ynyloxy)-1H-pyrimidine-2,4-dione