23873
Immature rat SCs were maintained 50h under basal conditions or exposed to 2 , 4 - D ( 100nM , 10 mu M and 1mM ) .
 Chemical: 2 , 4 - D
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: 2 , 4 - D