Using c1cnc(N2CCNCC2)nc1, O=C(O)c1cccc2cc[nH]c12 to produce O=C(c1cccc2cc[nH]c12)N1CCN(c2ncccn2)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.