24090
However , the introduction of a benzenesulfonyl group at N ( 1 ) - position switched the full agonist 6 to be a 5 - HT6 receptor antagonist ( 30 ) .
 Chemical: benzenesulfonyl
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: benzenesulfonyl