118721-29-2
2,7-Dibromo-4-oxo-3,4-dihydropyrrolo[3,2-d]pyrimidine
→
~71%
118721-30-5
2,7-Dibromo-4-chloropyrrolo[3,2-d]pyrimidine
272-50-4
5H-吡咯[3,2-D]嘧啶