Using O=c1nc(-c2ccc3c(c2)OCO3)c2cc3c(cc2[nH]1)OCO3, BrCC1CC1 to produce c1cc2c(cc1-c1nc(OCC3CC3)nc3cc4c(cc13)OCO4)OCO2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.