Using CCOC(=O)CNCCn1nc(-c2c(-c3ccccc3)nn3ccccc23)ccc1=O to produce O=C(O)CNCCn1nc(-c2c(-c3ccccc3)nn3ccccc23)ccc1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.