Using O=C(O)Cc1ccc(Cn2c3c(c4ccccc42)CCN(C(=O)OCc2ccccc2)C3)cc1 to produce O=C(O)Cc1ccc(Cn2c3c(c4ccccc42)CCNC3)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.