Using Clc1ccc(CN2CCN=C2Cc2ccccc2)c(Cl)c1, C=O to produce C=C(C1=NCCN1Cc1ccc(Cl)cc1Cl)c1ccccc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.