7287
Positively charged apomorphine was bound to the ion - exchange groups of the cation - exchange fibers until it was released by mobile counter - ions in the external solution .
 Chemical: apomorphine
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: apomorphine