6752
The content of 1 - propanol , ethyl acetate , 2 - methyl - 1 - propanol , 3 - methyl - 1 - butanol and 2 - methyl - 1 - butanol was determined by means of head space solid phase microextraction gas chromatography mass - spectrometry .
 1 - propanol, ethyl acetate, 2 - methyl - 1 - propanol, 3 - methyl - 1 - butanol, 2 - methyl - 1 - butanol
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 1 - propanol, ethyl acetate, 2 - methyl - 1 - propanol, 3 - methyl - 1 - butanol, 2 - methyl - 1 - butanol