Using O=C(OCc1ccccc1)N1CCc2nc3ccnn3c(N3CCOCC3)c2CC1 to produce c1cc2nc3c(c(N4CCOCC4)n2n1)CCNCC3, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.