The chemical with the SMILES O=c1c(-c2ccccc2)nc(-c2ccccc2)cn1O 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=c1c(-c2ccccc2)nc(-c2ccccc2)cn1O
O=c1c(-c2ccccc2)nc(-c2ccccc2)cn1O
4-hydroxy-2,6-diphenylpyrazin-5-one