5279
In order to differentiate between exogenous and endogenous FA the rats were exposed to stable isotope ( ( 13 ) C ) labeled FA by inhalation .
 Chemical: ( 13 ) C
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: ( 13 ) C