18021
Phytochemical investigation of chloroform extract from rhizomes of Hedychium spicatum resulted in the isolation of six new sesquiterpenes ( 1 - 6 ) along with fifteen known compounds ( 7 - 21 ) .
 chloroform, sesquiterpenes
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 chloroform, sesquiterpenes