Using Cc1c(C=O)sc2ccccc12, CC(C)(C)OC(=O)N1CCNCC1 to produce Cc1c(CN2CCN(C(=O)OC(C)(C)C)CC2)sc2ccccc12, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.