Using CC=C(CC)c1cccc2nc(Cc3c(C)cc(C)cc3C)n(C)c12 to produce CCC(CC)c1cccc2nc(Cc3c(C)cc(C)cc3C)n(C)c12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.