Using O=C(Nc1ccc2c(c1)CC1(C2)N=C(c2ccccc2)NC1=O)OCc1ccccc1 to produce Nc1ccc2c(c1)CC1(C2)N=C(c2ccccc2)NC1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.