88498-81-1
4-bromo-3-prop-2-enoxyxanthen-9-one
→
731-66-8
3-hydroxy-4-prop-2-enylxanthen-9-one
+
1088-10-4
6H-呋喃并[2,3-c]占吨-6-酮, 1,2-二氢-2-甲基-