Using CCC[C@H]1CC[C@H](C2CCC3(CC2)C(=O)C2(CCC([C@H]4CC[C@H](CCC)CC4)CC2)C3=O)CC1 to produce CCCCCCCC(=O)CCCCCC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.