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One - NH group of dimethylethylenediamine ( DMEDA ) first attacks the carbon atom of urea , eliminating one - NH3 group and forming an intermediate state CH3NHC2H4N ( CH3 ) CONH2 ( IMI ) .
 Chemical: NH; Chemical: dimethylethylenediamine; Chemical: DMEDA; Chemical: carbon; Chemical: urea; Chemical: NH3; Chemical: CH3NHC2H4N ( CH3 ) CONH2
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: NH; Chemical: dimethylethylenediamine; Chemical: DMEDA; Chemical: carbon; Chemical: urea; Chemical: NH3; Chemical: CH3NHC2H4N ( CH3 ) CONH2