18526
Kinetic parameters were determined in male and female rats after an intravenous and oral administration of ( 14 ) C labelled by fitting one - compartment models to measured pesticide concentrations in blood for each individual separately .
 ( 14 ) C
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 ( 14 ) C