Using Cc1nc2[nH]ccc2c(-c2ccc3c(c2)CCCO3)c1CO to produce Cc1nc2[nH]ccc2c(-c2ccc3c(c2)CCCO3)c1C=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.