5732
BALB / c mice were classified into 5 groups ( n = 15 ) and dose - dependent toxic effects after intratympanic injection with 3 - NP ( 300 - 5000 mM ) on the left ear were investigated to determine the appropriate toxicity level of 3 - NP .
 Chemical: 3 - NP; Chemical: 3 - NP
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: 3 - NP; Chemical: 3 - NP