21687
The vibrational sum frequency spectra are recorded at the same film density of the S - phase of the EE and FEE monolayers and analyzed in the spectral regions of OH , COC , CH3 , and CF3 stretching vibrations because these functional groups could be responsible for the different dipole potentials .
 Chemical: FEE; Chemical: OH; Chemical: COC; Chemical: CH3; Chemical: CF3
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: FEE; Chemical: OH; Chemical: COC; Chemical: CH3; Chemical: CF3