12966
The small molecule S9a was derived from an established tumor necrosis factor-alpha ( TNF-alpha ) inhibitor ( Canventol ) by replacement of the isopropylidine group with a phenyl ring .
 ( protein: TNF-alpha, None) , ( protein: tumor necrosis factor-alpha, None) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: RNA,cell type,protein,cell line,DNA, Arguments type: . 
Text: {0} 
Answer:
 ( protein: TNF-alpha, None) , ( protein: tumor necrosis factor-alpha, None) 