611
Rats in group II were administered with MC only ( 25 mg / kg b . w . , 1 / 4 of median lethal dose ( LD ( 50 ) ) ) , while those in groups IV and VI were pretreated with vitamin E ( 100 mg / kg b . w . ) and taurine ( 50 mg / kg b . w . ) for 20 days , respectively , and then exposed to MC ( 25 mg / kg b . w . ) .
 vitamin E, taurine
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 vitamin E, taurine