1965
The specificities of these mAbs were evaluated by frontal affinity chromatography using 142 kinds of 2 - aminopyridine ( PA ) - derivatized oligosaccharides .
 Chemical: 2 - aminopyridine
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: 2 - aminopyridine