848398-40-3
5,7-dihydro-1H-furo[3,4-d]pyrimidine-2,4-dione
→
~47%
848398-41-4
2,4-dichloro-5,7-dihydrofuro[3,4-d]pyrimidine
89898-51-1
4-氧代四氢呋喃-3-羧酸乙酯