7696
Through this collected evidence , we provide an integrative hypothesis on how 3 - hydroxykynurenine is exerting its dual actions in the Central Nervous System and what will be the course of investigations in this field for the next years .
 Chemical: 3 - hydroxykynurenine
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 - hydroxykynurenine