Using C=CC(=O)OC(C)(C)C, CC(C)n1c(=O)n(C(=O)NCC2CCNCC2)c2ccccc21 to produce CC(C)n1c(=O)n(C(=O)NCC2CCN(CCC(=O)OC(C)(C)C)CC2)c2ccccc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.