5430
There is much attention to the role of psychotropic compounds acting on serotonin ( 5 - HT ) receptors in ameliorating cognitive deficits of the disease .
 Chemical: serotonin; Chemical: 5 - HT
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: serotonin; Chemical: 5 - HT