Using COC1(Cc2ccccc2C)CCC(N2CCN(C(=O)OC(C)(C)C)CC2)CC1 to produce COC1(Cc2ccccc2C)CCC(N2CCNCC2)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.