14890
It was found that the introduction of 1 - en - 3 - one and 9 ( 11 ) , 12 - diene and 2 , 20 - dinitrile functionalities into the scaffold of GA led to the discovery of potent compound 19 for inhibition of LPS - induced NO production .
 1 - en - 3 - one, 9 ( 11 ) , 12 - diene, 2 , 20 - dinitrile, NO
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 1 - en - 3 - one, 9 ( 11 ) , 12 - diene, 2 , 20 - dinitrile, NO