12025
The dehydration mechanisms for glucose in beta - pyranose ( BP ) and in open - chain ( OC ) forms , catalyzed by acids homogeneously and heterogeneously , were investigated using density functional and two - layer ONIOM calculations .
 Chemical: glucose; Chemical: beta - pyranose
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
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Answer:
 Chemical: glucose; Chemical: beta - pyranose