Using O=C(Nc1ccc(Oc2cccc3c2CCC3O)nc1)c1ccc(Cl)c(Cl)c1 to produce O=C(Nc1ccc(Oc2cccc3c2CC=C3)nc1)c1ccc(Cl)c(Cl)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.