1541
The major indole alkaloid N , beta - D - glucopyranosyl vincosamide from leaves of Psychotria leiocarpa Cham .
 indole alkaloid, N , beta - D - glucopyranosyl vincosamide
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 indole alkaloid, N , beta - D - glucopyranosyl vincosamide