Using O=C(Nc1cccc2c3c(oc12)CCCC3O)c1c(Cl)cccc1Cl to produce O=C(Nc1cccc2c3c(oc12)CCC=C3)c1c(Cl)cccc1Cl, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.