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Ethyl acetate - n - butanol - water ( 1 : 2 : 3 , v / v / v ) was selected as the optimum solvent system to purify geniposidic acid .
 Chemical: Ethyl acetate; Chemical: n - butanol; Chemical: geniposidic acid
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: Ethyl acetate; Chemical: n - butanol; Chemical: geniposidic acid