8882
Through a series fluorescence quenching experiments and experiments in the presence of a known competitive antagonist ( Granisetron ) , it was shown that 5HT * specifically binds to purified homo - pentameric type - 3 human serotonin receptors ( 5HT ( 3A ) ) .
 Chemical: Granisetron; Chemical: 5HT; Chemical: serotonin; Chemical: 5HT
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: Granisetron; Chemical: 5HT; Chemical: serotonin; Chemical: 5HT