21825
The structure - activity relationships ( SARs ) revealed that the most potent analogues 1f and 1o were identified as potent inhibitors of NO production with IC50 values of 3 . 30 and 3 . 24 mu M , respectively .
 Chemical: NO
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: NO