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Identification of ginkgolic acid ( 15 : 1 ) metabolites in rats following oral administration by high - performance liquid chromatography coupled to tandem mass spectrometry .
 Chemical: ginkgolic acid ( 15 : 1 )
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: ginkgolic acid ( 15 : 1 )