4203
The affinity matrix was synthesised by coupling sulphanilamide as the ligand and L - tyrosine as the spacer arm to a cyanogen bromide ( CNBr ) - activated - Sepharose 4B matrix .
 Chemical: sulphanilamide; Chemical: L - tyrosine; Chemical: cyanogen bromide; Chemical: CNBr; Chemical: Sepharose 4B
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: sulphanilamide; Chemical: L - tyrosine; Chemical: cyanogen bromide; Chemical: CNBr; Chemical: Sepharose 4B