6-amino-1-[2'-deoxy-β-D-erythro-pentofuranosyl]-4-methoxy-1H-pyrazolo[3,4-d]pyrimidine

4-甲氧基-1H-吡唑并[3,4-D]嘧啶-6-胺

Hoffer's chlorosugar

2-氨基-4,6-二氯嘧啶-5-甲醛

4-氯-1H-吡唑并[3,4-D]嘧啶-6-胺