5-methoxy-2,2-dimethyl-1a,7b-dihydrooxireno[2,3-c]chromene

早熟素Ⅰ

trans-3,4-dihydroxy-7-methoxy-2,2-dimethylchroman

7-甲氧基-2,2-二甲基苯并二氢吡喃-4-酮

3-hydroxy-7-methoxy-2,2-dimethylchroman-4-yl 3-chlorobenzoate