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A novel permeation enhancer : N - succinyl chitosan on the intranasal absorption of isosorbide dinitrate in rats .
 Chemical: N - succinyl; Chemical: isosorbide dinitrate
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: N - succinyl; Chemical: isosorbide dinitrate