8-methoxy-2,2,7-trimethyl-3,4-dihydro-2H,5H-pyrano[3,2-c]chromen-5-one

4-hydroxy-2,2,8-trimethyl-3,4-dihydro-2H,5H-pyrano[3,2-c]chromen-5-one

4-hydroxy-7-methoxy-8-methylchromen-2-one

3,4-dihydro-8-methoxy-2,2,9-trimethyl-2H,5H-pyrano(2,3-b)(1)benzopyran-5-one

异戊二烯