Using CSc1ccccc1C=O, c1ccc([P+](Cc2n[nH]c3ccccc23)(c2ccccc2)c2ccccc2)cc1 to produce CSc1ccccc1/C=C/c1n[nH]c2ccccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.