提供原料步骤，做两步
6,7-dimethoxy-4-(2-(5-methoxy-2,2-dimethyl-2H-chromen-6-yl)-2-oxoethyl)-2H-chromen-2-one
Chemical Formula: C25H24O7
Exact Mass: 436.1522
Molecular Weight: 436.4600
Elemental Analysis: C, 68.80; H, 5.54; O, 25.66
提供原料步骤，做两步
6,7-dimethoxy-4-(2-(5-methoxy-2,2-dimethyl-2H-chromen-6-yl)-2-oxoethyl)-2H-chromen-2-one
Chemical Formula: C25H24O7
Exact Mass: 436.1522
Molecular Weight: 436.4600
Elemental Analysis: C, 68.80; H, 5.54; O, 25.66
