Using COC(=O)C1(c2ccc(C(=O)Nc3cc(N4CCOCC4)n4nccc4n3)cc2)CC1 to produce O=C(Nc1cc(N2CCOCC2)n2nccc2n1)c1ccc(C2(C(=O)O)CC2)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.