24631-83-2
4-hydroxy-8-methyl-2H-1-benzopyran-2-one
+
115-18-4
2-甲基-3-丁烯-2-醇
→
~20%
88538-27-6
2,2,7-trimethyl-3,4-dihydropyrano[3,2-c]chromen-5-one