Using CCOC(=O)CCc1ccc(CCc2cnc3c(N)nc4cc(C)ccc4c3c2)c(C)c1 to produce CCOC(=O)/C=C/c1ccc(CCc2cnc3c(N)nc4cc(C)ccc4c3c2)c(C)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.