Using O=Cc1ccnc(N2CCCC2)c1, CN(C(=O)OC(C)(C)C)C1CCNCC1 to produce CN(C(=O)OC(C)(C)C)C1CCN(Cc2ccnc(N3CCCC3)c2)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.