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On the basis of the energy states of the tautomers and isomers as estimated by DFT calculations , a schematic energy diagram was determined for the photothermal tautomerization processes in acetonitrile .
 Chemical: acetonitrile
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: acetonitrile