Using O=C[O-], Cc1ccc2c(c1)c1c(n2-c2ccc3cnccc3c2)CCN(C)C1 to produce Cc1ccc2c(c1)c1c(n2-c2ccc3c(c2)CCN(C=O)C3)CCN(C)C1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.