Using Cc1cc(C)c(-c2c(C)nn3c(=O)c(CCO)c(C)[nH]c23)c(C)c1 to produce Cc1cc(C)c(-c2c(C)nn3c(=O)c(CC=O)c(C)[nH]c23)c(C)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.