Using COC(=O)c1cccc(C2CCN(c3nc4c(c(NC5CCOCC5)n3)S(=O)CC4)CC2)c1 to produce O=C(O)c1cccc(C2CCN(c3nc4c(c(NC5CCOCC5)n3)S(=O)CC4)CC2)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.