Using CC(=O)O, CCOC(=O)Cn1nnc(-c2cccc(OCc3ccc4ccccc4n3)c2)n1 to produce O=C(O)Cn1nnc(-c2cccc(OC(=O)c3ccc4ccccc4n3)c2)n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.