906
RATIONALE : 5 - Hydroxytryptamine , via stimulation of 5 - HT 2C receptors , exerts a tonic inhibitory influence on dopaminergic neurotransmission , whereas activation of 5 - HT 2A receptors enhances stimulated DAergic neurotransmission .
 Chemical: 5 - Hydroxytryptamine; Chemical: 5 - HT; Chemical: 5 - HT
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: 5 - Hydroxytryptamine; Chemical: 5 - HT; Chemical: 5 - HT