1739
The influence of the solvent on the single and double proton transfer reactions was examined in three solvents ( chloroform , methanol and water ) using the polarizable continuum model ( PCM ) approximation .
 chloroform, methanol
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 chloroform, methanol