Using Cc1cccnc1CN(Cc1ncccc1C)C1CCNCC1, COC(=O)CBr to produce COC(=O)CN1CCC(N(Cc2ncccc2C)Cc2ncccc2C)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.