15760
Carcinogenicity of ethyl tertiary - butyl ether ( ETBE ) was examined with inhalation exposure using F344 / DuCrlCrlj rats .
 ethyl tertiary - butyl ether, ETBE
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 ethyl tertiary - butyl ether, ETBE