Using CC1c2cc3c(cc2C(=O)N1CCC1CCN(C(=O)OC(C)(C)C)CC1)OCO3 to produce CC1c2cc3c(cc2C(=O)N1CCC1CCNCC1)OCO3, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.