18872
It is found that the reaction is thermodynamically favorable and indicates that two - state reactivity may play an important role in lowering the energy of the hydridomethyl intermediate .
 Chemical: hydridomethyl
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: hydridomethyl