3a,4,5,6-tetrahydro-2H-cyclopenta[c]pyrazol-3-one

4-methylsulfanyl-6,7-dihydro-5H-cyclopenta[d]pyrimidin-2-amine

2-methylsulfanyl-1,5,6,7-tetrahydrocyclopenta[d]pyrimidine-4-thione

2-氧代环戊羧酸烯丙酯

2-chloro-6,7-dihydro-5H-cyclopenta[d]pyrimidin-4-amine