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Profile hidden Markov models ( HMMs ) were used to predict the configuration of secondary alcohols and alpha - methyl branches of modular polyketides .
 Chemical: secondary alcohols; Chemical: alpha - methyl
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: secondary alcohols; Chemical: alpha - methyl