29571
The animals in Cr ( VI ) group were administered a single dose of K2Cr2O7 ( 20 mg / kg , intraperitoneally ( ip ) ) .
 Cr ( VI ), K2Cr2O7
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 Cr ( VI ), K2Cr2O7