3051
Following MDMA administration , the same dose of tryptophan caused a smaller ( 26 % ) rise in brain serotonin whereas in blood it had no effect .
 Chemical: MDMA; Chemical: tryptophan; 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: MDMA; Chemical: tryptophan; Chemical: serotonin