1481
Memory function and serotonin transporter promoter gene polymorphism in ecstasy ( MDMA ) users .
 Chemical: serotonin; Chemical: ecstasy; Chemical: MDMA
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: serotonin; Chemical: ecstasy; Chemical: MDMA