8-phenyl-3,7-dihydropurine-6-thione

阿扎次黄嘌呤

7-chloro-2-phenyl-1,3-dihydro-[1,3,2]diazaphospholo[4,5-d]pyrimidine 2-oxide

N-phenyl-[1,2,5]thiadiazolo[3,4-d]pyrimidin-7-amine

7-氨基-噻唑并[5,4-d]嘧啶-2(1H)-硫酮