3048
Recent studies have demonstrated a similar acute effect of 3 , 4 - methylenedioxymethamphetamine ( MDMA ) in blood platelets and brain tissue via action on the serotonin transporter .
 Chemical: 3 , 4 - methylenedioxymethamphetamine; Chemical: MDMA; Chemical: serotonin
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: 3 , 4 - methylenedioxymethamphetamine; Chemical: MDMA; Chemical: serotonin