Using CCCCOc1cc2c(cc1OC)C(Cc1cccc(OC)c1)N(C(=O)OCC)C=C2C=O to produce CCCCOc1cc2c(cc1OC)C(Cc1cccc(OC)c1)NC=C2C=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.