2361
In this study , the food safety of genetically modified ( GM ) , glyphosate - tolerant maize with the G2 - aroA gene was evaluated in a 90 - day feeding study in Sprague - Dawley ( SD ) rats .
 glyphosate
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 glyphosate