Using CCOC(=O)COc1cc(C#N)ccc1Oc1ccc2c(c1)COB2O to produce N#Cc1ccc(Oc2ccc3c(c2)COB3O)c(OCC(=O)O)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.