28802
The abundance of serotonin and 5 - hydroxyindoleacetic acid in brain of Tg - 2D6 is higher than in WT mice , either basal levels or after harmaline induction .
 Chemical: serotonin; Chemical: 5 - hydroxyindoleacetic acid; Chemical: harmaline
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: serotonin; Chemical: 5 - hydroxyindoleacetic acid; Chemical: harmaline