Using CCOC(=O)C(C)C1OB(O)c2cc(Oc3nnc(N)s3)cc(C)c21 to produce Cc1cc(Oc2nnc(N)s2)cc2c1C(C(C)C(=O)O)OB2O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.