Using O=C(O)c1ccncc1, Cc1c[nH]c2ncnc(N3CCC(N)CC3)c12 to produce Cc1c[nH]c2ncnc(N3CCC(NC(=O)c4ccncc4)CC3)c12, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.