Using O=C1CCCC(=O)O1, CC(C)=CCC/C(C)=C/CC/C(C)=C/CSC[C@H](N)C(=O)O to produce CC(C)=CCC/C(C)=C/CC/C(C)=C/CSC[C@H](NC(=O)CCCC(=O)O)C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.