10961
In this regard , we evaluate here the efficacy of Smo as it relates to the activation of G ( i ) , by comparing Smo with the 5 - hydroxytryptamine ( 1A ) ( 5 - HT ( 1A ) ) receptor , a quintessential G ( i ) - coupled receptor .
 5 - hydroxytryptamine, 5 - HT
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 5 - hydroxytryptamine, 5 - HT