5,8-dimethyl-9-(1'-methylethylidene)-1,2,3,4-tetrahydro-1,4-methanonaphthalene

乙醛

丙酮

r,t-1,4-dimethyl-t,c-2,3-dihydroxy-1,2,3,4-tetrahydronaphthalene

potassium 1,4-dimethylnaphthalenide