Using COc1ccc2c(Cc3c(Cl)cncc3Cl)nncc2c1C#CCCCc1ccccc1 to produce COc1ccc2c(Cc3c(Cl)cncc3Cl)nncc2c1C=CCCCc1ccccc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.