Using CC1CCC(Nc2ccccc2)c2ncc(C(=O)O)c(=O)n21 to produce CC1CC=C(Nc2ccccc2)c2ncc(C(=O)O)c(=O)n21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.