4-(dimethylamino)-4-phenylethyl-spiro[cyclohexane-1,8'-(3-trifluoromethyl-5,6,8,9-tetrahydropyrano[3,4-b]-7-azaindole)] 、
柠檬酸 以
乙醚 、
乙醇 为溶剂,
以87%的产率得到4-(dimethylamino)-4-phenylethyl-spiro[cyclohexane-1,8'-(3-trifluoromethyl-5,6,8,9-tetrahydropyrano[3,4-b]-7-azaindole)] citrate