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We report a first - principles density functional theory investigation on tailoring the fundamental reaction mechanism of synthesizing 1 , 3 - dimethyl - 2 - imidazolidinone ( DMI ) through the urea method with water serving as both solvent and catalyst .
 Chemical: 1 , 3 - dimethyl - 2 - imidazolidinone; Chemical: DMI; Chemical: urea
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: 1 , 3 - dimethyl - 2 - imidazolidinone; Chemical: DMI; Chemical: urea