4,6-dimethylpyrano[3,2-g]chromene-2,8-dione

6-乙酰基-7-羟基-4-甲基-2H-色烯-2-酮

ethyl E-3-(5-acetyl-2,4-dihydroxyphenyl)-2-butenoate

ethyl E-3-(5-acetyl-2-ethoxy-4-hydroxyphenyl)-2-butenoate

ethyl E-3-(7-hydroxy-4-methyl-2-oxo-2H-1-benzopyran-6-yl)-2-butenoate