19904
Lapin suggested and discovered that KYN and its metabolites affect brain functions , and proposed the role of neurokynurenines in pathogenesis of depression and action mechanisms of antidepressant effect ( kynurenine hypothesis ) .
 Chemical: KYN; Chemical: kynurenine
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: KYN; Chemical: kynurenine