26250
Chitosan - thiobutylamidine - mercaptonicotinamide displayed 1 . 8 - fold higher stability and 1 . 6 - fold higher mucoadhesive properties , respectively .
 Chemical: thiobutylamidine; Chemical: mercaptonicotinamide
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: thiobutylamidine; Chemical: mercaptonicotinamide