24087
To further investigate the structure - activity relationship ( SAR ) of the 5 - hydroxytryptamine type 6 ( 5 - HT6 ) receptor agonist 5 - chloro - 2 - methyl - 3 - ( 1 , 2 , 3 , 6 - tetrahydropyridin - 4 - yl ) - 1H - indole ( EMD386088 , 6 ) , a series of 2 - methyl - 3 - ( 1 , 2 , 3 , 6 - tetrahydropyridin - 4 - yl ) - 1H - indoles were synthesized , and in vitro affinity to , and functional activity at 5 - HT6 receptors was tested .
 Chemical: 5 - hydroxytryptamine; Chemical: 5 - chloro - 2 - methyl - 3 - ( 1 , 2 , 3 , 6 - tetrahydropyridin - 4 - yl ) - 1H - indole; Chemical: EMD386088; Chemical: 2 - methyl - 3 - ( 1 , 2 , 3 , 6 - tetrahydropyridin - 4 - yl ) - 1H - indoles
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: 5 - hydroxytryptamine; Chemical: 5 - chloro - 2 - methyl - 3 - ( 1 , 2 , 3 , 6 - tetrahydropyridin - 4 - yl ) - 1H - indole; Chemical: EMD386088; Chemical: 2 - methyl - 3 - ( 1 , 2 , 3 , 6 - tetrahydropyridin - 4 - yl ) - 1H - indoles