METHODS The hydroxyl groups of magnolol were protected using ketol reaction and the products were purified by recrystallization from hexane.

方法将朴酚两羟基缩酮保护,再正己烷重结晶分离。

The perservative in liquid beverage was extrcated with n-hexane.The hexane layer was subjected to cyclodextrine polymer resin colume.The colume was eluted with aqueous solution of ethanol.

正己烷萃取液体饮料中防腐剂，使萃取液经环糊精交联树脂分离后，溶液洗脱。

METHODS The hydroxyl groups of magnolol were protected using ketol reaction and the products were purified by recrystallization from hexane.

方法将朴酚两羟基用缩酮保护,再用正己烷重离纯化。

The perservative in liquid beverage was extrcated with n-hexane.The hexane layer was subjected to cyclodextrine polymer resin colume.The colume was eluted with aqueous solution of ethanol.

用正己烷萃取液体饮料中的防腐剂，使萃取液经环糊交联树脂离后，用乙醇溶液洗脱。

METHODS The hydroxyl groups of magnolol were protected using ketol reaction and the products were purified by recrystallization from hexane.

方法将朴酚两羟基用缩酮保护,再用正己烷重结晶分离纯化。

The perservative in liquid beverage was extrcated with n-hexane.The hexane layer was subjected to cyclodextrine polymer resin colume.The colume was eluted with aqueous solution of ethanol.

用正己烷萃取液体饮料中的防腐剂，使萃取液经环糊精交联树脂分离后，用乙醇溶液洗脱。

METHODS The hydroxyl groups of magnolol were protected using ketol reaction and the products were purified by recrystallization from hexane.

方法将朴酚两羟基用缩酮保护,再用正己烷重结晶离纯化。

The perservative in liquid beverage was extrcated with n-hexane.The hexane layer was subjected to cyclodextrine polymer resin colume.The colume was eluted with aqueous solution of ethanol.

用正己烷萃取液体饮料中的防腐剂，使萃取液经环糊精交联离后，用乙醇溶液洗脱。

METHODS The hydroxyl groups of magnolol were protected using ketol reaction and the products were purified by recrystallization from hexane.

方法将朴酚两羟基用缩酮保护,再用正己烷重结晶化。

The perservative in liquid beverage was extrcated with n-hexane.The hexane layer was subjected to cyclodextrine polymer resin colume.The colume was eluted with aqueous solution of ethanol.

用正己烷萃取液体饮料中的防腐剂，使萃取液经环糊交联树脂后，用乙溶液洗脱。

METHODS The hydroxyl groups of magnolol were protected using ketol reaction and the products were purified by recrystallization from hexane.

方法将朴酚两羟基用缩酮保护,再用正重结晶分离纯化。

The perservative in liquid beverage was extrcated with n-hexane.The hexane layer was subjected to cyclodextrine polymer resin colume.The colume was eluted with aqueous solution of ethanol.

用正萃取体饮料中的防腐剂，使萃取经环糊精交联树脂分离后，用乙洗脱。

METHODS The hydroxyl groups of magnolol were protected using ketol reaction and the products were purified by recrystallization from hexane.

方法将朴酚两羟基用缩酮保护,再用正重结晶分离纯。

The perservative in liquid beverage was extrcated with n-hexane.The hexane layer was subjected to cyclodextrine polymer resin colume.The colume was eluted with aqueous solution of ethanol.

用正萃取体饮料中的防腐剂，使萃取经环糊精交联树脂分离后，用乙醇脱。

METHODS The hydroxyl groups of magnolol were protected using ketol reaction and the products were purified by recrystallization from hexane.

方法将朴酚两羟基缩酮保护,再正己烷重结晶分离。

The perservative in liquid beverage was extrcated with n-hexane.The hexane layer was subjected to cyclodextrine polymer resin colume.The colume was eluted with aqueous solution of ethanol.

正己烷萃取液体饮料中防腐剂，使萃取液经环糊精交联树脂分离后，溶液洗脱。

METHODS The hydroxyl groups of magnolol were protected using ketol reaction and the products were purified by recrystallization from hexane.

方法将朴酚两羟基用缩酮保护,再用正己烷重结晶分离纯化。

The perservative in liquid beverage was extrcated with n-hexane.The hexane layer was subjected to cyclodextrine polymer resin colume.The colume was eluted with aqueous solution of ethanol.

用正己烷萃取液体饮料中的防腐剂，使萃取液经环糊精交联树脂分离后，用乙醇溶液洗脱。