The chemical with the SMILES [O-][n+]1onc2c3cc(-c4ccccc4)nnc3ccc21 is not an inhibitor of the EPH receptor A4.
The {#molecule|compound|chemical|molecular species|chemical compound!} with the {SMILES__description} {#representation of |!}{SMILES#} is {MUV-689#not &NULL}{MUV-689__names__noun}.
[O-][n+]1onc2c3cc(-c4ccccc4)nnc3ccc21
[O-][n+]1onc2c3cc(-c4ccccc4)nnc3ccc21
3-oxido-8-phenyl-[1,2,5]oxadiazolo[3,4-f]cinnolin-3-ium