21143
Phytochemical investigation of the dichloromethane extract of the leaves of Peltophorum pterocarpum , a tropical ornamental tree , led to the isolation of twelve compounds ( 1 - 12 ) .
 dichloromethane
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 dichloromethane