Using COC(=O)C1(OC(=O)Cc2ccc(OCc3ccc4ccccc4n3)cc2)CC1 to produce O=C1OC2(CC2)C(O)=C1c1ccc(OCc2ccc3ccccc3n2)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.