Using C=Cc1c2c3c(cccc3n1CCC)[C@H]1C[C@H](NC(=O)N(CC)CC)CN(C)[C@@H]1C2 to produce CCCn1c(CC)c2c3c(cccc31)[C@H]1C[C@H](NC(=O)N(CC)CC)CN(C)[C@@H]1C2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.