17891
The electronic transitions of 20 naturally occurring amino acids in aqueous solution were studied with attenuated total reflection far - ultraviolet ( ATR - FUV ) spectroscopy in the region from 145 to 300 nm .
 Chemical: amino acids
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: amino acids