650638-01-0
5-氨基-1-(2-噻唑)-1H-吡唑-4-甲腈
→
650638-04-3
4-氯-1-(2-噻唑)-1H-吡唑并[3,4-d]嘧啶
650638-03-2
1,5-二氢-1-(2-噻唑)-4H-吡唑并[3,4-d]嘧啶-4-酮