8507
Low aqueous solubility is often a limiting aspect to the bioavailability of poorly soluble , but highly permeable drugs ( class II compounds according to the Biopharmaceutics Classification System - BCS ) administered in single drug products or as fixed dose combinations .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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