2,2-二甲基-6-乙酰基苯并二氢吡喃

1-diethoxyphosphoryl-3-methylbuta-1,2-diene

2,3,3-trimethyl-2H-furo[3,2-c]chromen-4-one

1-(5,7-dihydroxy-2,2-dimethylchromen-6-yl)ethanone

1-(5,7-dihydroxy-2,2-dimethyl-2H-chromen-8-yl)ethan-1-one