Using CCOC=O, Cc1cc(NC(=O)c2ccccc2Sc2ccc3c(c2)NC(=O)C3)n(C)n1 to produce Cc1cc(NC(=O)c2ccccc2Sc2ccc3c(c2)NC(=O)/C3=C\O)n(C)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.