Using O=C(CCCN1CCCCC1)c1ccc2c(c1)Cc1cc(C(=O)CCCN3CCCCC3)ccc1-2, O=[Cr](=O)([O-])O[Cr](=O)(=O)[O-] to produce O=C(CCCN1CCCCC1)c1ccc2c(c1)C(=O)c1cc(C(=O)CCCN3CCCCC3)ccc1-2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.