Using COC(=O)C1(C=O)CCC1, CC(C)(C)OC(=O)NCC1CCNCC1 to produce COC(=O)C1(CN2CCC(CNC(=O)OC(C)(C)C)CC2)CCC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.