Using COc1cccc(C23CCN(C(=O)OC(C)(C)C)CC2O3)c1 to produce COc1cccc(C2CCN(C(=O)OC(C)(C)C)CC2O)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.