17949
By contrast , head twitches induced by treatment with the 5 - HT ( 2A / 2C ) agonist ( +/- ) - 2 , 5 - dimethoxy - 4 - iodophenyl - 2 - aminopropane ( DOI ) were similar in mice of all three DAT genotypes .
 Chemical: 5 - HT; Chemical: ( +/- ) - 2 , 5 - dimethoxy - 4 - iodophenyl - 2 - aminopropane; Chemical: DOI
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 - HT; Chemical: ( +/- ) - 2 , 5 - dimethoxy - 4 - iodophenyl - 2 - aminopropane; Chemical: DOI