3-[(2-amino-6-chloropyrimidin-4-yl)amino]-5-(hydroxymethyl)cyclopentane-1,2-diol

4-N-butyl-6-chloropyrimidine-2,4-diamine

4,6-dichloro-2-isocyanatopyrimidine

2-氨基-4,6-二巯基嘧啶

6-chloro-4-N-prop-2-enylpyrimidine-2,4-diamine