Using C=CCC(C(=O)O)c1c(-c2ccc(C)cc2C)c2ccccc2c(=O)n1C to produce CCCC(C(=O)O)c1c(-c2ccc(C)cc2C)c2ccccc2c(=O)n1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.