90213-66-4
2,4-二氯-7H-吡咯并[2,3-d]嘧啶
→
~41%
1053228-29-7
2,4-二氯-5-氟-7h-吡咯并[2,3-d]嘧啶
+
1053228-28-6
2,4,5-三氯-7H-吡咯[2,3-D]嘧啶