Using COC1NC(=O)c2cc(OCc3ccccc3)c3c(c21)O[C@@]12CC[C@H](O)C(C)(C)[C@@H]1CC[C@H](C)[C@@]2(C)C3 to produce C[C@H]1CC[C@H]2C(C)(C)[C@@H](O)CC[C@]23Oc2c(c(OCc4ccccc4)cc4c2C(O)NC4=O)C[C@]13C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.