Using O=C1Cc2ccccc2N1, Cc1[nH]c(C=O)c(C)c1CCC(=O)O to produce Cc1[nH]c(C=C2C(=O)Nc3ccccc32)c(C)c1CCC(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.