Using COCC(c1c[nH]c2ccc(OCc3ccccc3)cc12)C(N)C(=O)OC(C)C, C=O to produce COCC1c2c([nH]c3ccc(OCc4ccccc4)cc23)CNC1C(=O)OC(C)C, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.