Using O=C1CCC(=O)O1, CC1(C)c2ccccc2N(CCO)C12C=Cc1cc([N+](=O)[O-])ccc1O2 to produce CC1(C)c2ccccc2N(CCOC(=O)CCC(=O)O)C12C=Cc1cc([N+](=O)[O-])ccc1O2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.