7'-(hydroxymethyl)-4',4',8'a-trimethylspiro[1,3-dioxolane-4,8'-2,3,4a,5-tetrahydro-1H-naphthalene]-2-one 、
氯甲酸-2,2,2-三氯乙酯 生成 (5',5',8'a-trimethyl-2-oxospiro[1,3-dioxolane-4,1'-4a,6,7,8-tetrahydro-4H-naphthalene]-2'-yl)methyl 2,2,2-trichloroethyl carbonate