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On the 2nd postnatal day ( P2 ) , dams were subcutaneously implanted with osmotic minipumps releasing nicotine ( NIC - 6mg / kg / day ) or saline for 14days .
 Chemical: nicotine; Chemical: NIC
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: nicotine; Chemical: NIC