7619
Indoleamine 2 , 3 - dioxygenase inhibitory activity of derivatives of marine alkaloid tsitsikammamine A .
 Indoleamine, tsitsikammamine A
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 Indoleamine, tsitsikammamine A