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beta - Chloroprene ( 2 - chloro - 1 , 3 - butadiene ) , a monomer used in the production of neoprene elastomers , is of regulatory interest due to the production of multiorgan tumors in mouse and rat cancer bioassays .
 Chemical: beta - Chloroprene; Chemical: 2 - chloro - 1 , 3 - butadiene; Chemical: neoprene
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: beta - Chloroprene; Chemical: 2 - chloro - 1 , 3 - butadiene; Chemical: neoprene