Using O=Cc1cccc2c1OCC2, O=C(O)CC[P+](c1ccccc1)(c1ccccc1)c1ccccc1 to produce O=C(O)CC=Cc1cccc2c1OCC2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.