26562
An analytical method which offers accurate determination and identification of eight alpha - keto acids ( alpha - ketoglutaric acid , pyruvic acid , 4 - hydroxyphenylpyruvic acid , 3 - methyl - 2 - oxobutyric acid , alpha - keto - gamma - methylthiobutyric acid , 4 - methyl - 2 - oxovaleric acid , 3 - methyl - 2 - oxovaleric acid , and phenylpyruvic acid ) in pork meat and Iberian ham samples is reported .
 Chemical: alpha - keto acids; Chemical: alpha - ketoglutaric acid; Chemical: pyruvic acid; Chemical: 4 - hydroxyphenylpyruvic acid; Chemical: 3 - methyl - 2 - oxobutyric acid; Chemical: alpha - keto - gamma - methylthiobutyric acid; Chemical: 4 - methyl - 2 - oxovaleric acid; Chemical: 3 - methyl - 2 - oxovaleric acid; Chemical: phenylpyruvic acid
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: alpha - keto acids; Chemical: alpha - ketoglutaric acid; Chemical: pyruvic acid; Chemical: 4 - hydroxyphenylpyruvic acid; Chemical: 3 - methyl - 2 - oxobutyric acid; Chemical: alpha - keto - gamma - methylthiobutyric acid; Chemical: 4 - methyl - 2 - oxovaleric acid; Chemical: 3 - methyl - 2 - oxovaleric acid; Chemical: phenylpyruvic acid