Using OC[C@@H]1CC[C@H](n2cnc3c(NCC4CC4)ncnc32)O1, CCC(=O)Cl to produce CCC(=O)OC[C@@H]1CC[C@H](n2cnc3c(NCC4CC4)ncnc32)O1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.