Task: Please determine if the molecule with the SMILES CCCN1CNc2c(c(=O)[nH]c(=S)n2-c2ccc(Cl)cc2)C1 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}
1-(4-chlorophenyl)-6-propyl-2-sulfanylidene-7,8-dihydro-5H-pyrimido[4,5-d]pyrimidin-4-one