91238-45-8
pent-4-ene-2,3-dione
+
78-90-0
1,2-丙二胺
→
649563-98-4
5-ethenyl-2,6-dimethyl-2,3-dihydropyrazine
649564-00-1
6-ethenyl-2,5-dimethyl-2,3-dihydropyrazine