51751-33-8
methyl 2-methyl-4-oxochromene-3-carboxylate
+
108-94-1
环己酮
→
~90%
83344-76-7
spiro[4H-pyrano[4,3-b]chromene-3,1'-cyclohexane]-1,10-dione
83344-78-9
11-hydroxy-7,8,9,10-tetrahydrobenzo[b]xanthen-12-one