11711
The 2 - hydroxy - gamma - pyrone form was established for these metabolites based on the comparison of their experimental IR spectra with the DFT calculated ones , for both the corresponding 4 - hydroxy - alpha - pyrone and 2 - hydroxy - gamma - pyrone forms .
 Chemical: 2 - hydroxy - gamma - pyrone; Chemical: 4 - hydroxy - alpha - pyrone; Chemical: 2 - hydroxy - gamma - pyrone
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: 2 - hydroxy - gamma - pyrone, 4 - hydroxy - alpha - pyrone, 2 - hydroxy - gamma - pyrone 
Answer:
 Chemical: 2 - hydroxy - gamma - pyrone; Chemical: 4 - hydroxy - alpha - pyrone; Chemical: 2 - hydroxy - gamma - pyrone