6,7-二氢-5H-环戊烯并嘧啶-2,4-二胺

6,7-二氢-1H-环戊并[D]嘧啶-2,4(3H,5H)-二酮

6,7-二氢-5H-环戊[d]嘧啶-2-胺

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

4-氯-6,7-二氢-5H-环戊并嘧啶-2-胺