Using COc1cc2c(cc1OC)CN(C(=O)C1CCN(C(=O)OC(C)(C)C)CC1)CC2 to produce COc1cc2c(cc1OC)CN(C(=O)C1CCNCC1)CC2, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.