Task: Please determine if the molecule with the SMILES O=c1[nH]n(-c2ccccc2)c(=O)c(Cl)c1Cl is an inhibitor of factor XIa (FXIa).
Result: no
Task: Please {#determine|predict|estimate!} if the {#molecule|compound!} with the {SMILES__description} {SMILES#} is {MUV-846__names__noun}.
Result: {MUV-846#no&yes}
O=c1[nH]n(-c2ccccc2)c(=O)c(Cl)c1Cl
O=c1[nH]n(-c2ccccc2)c(=O)c(Cl)c1Cl
4,5-dichloro-2-phenyl-1H-pyridazine-3,6-dione