Using C=Cc1c(CCN2CCN(C(=O)OC(C)(C)C)CC2)ccc2c1COC2=O to produce CCc1c(CCN2CCN(C(=O)OC(C)(C)C)CC2)ccc2c1COC2=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.