Using COCC(=O)Cl, COc1ccc(N2CCOCC2)c2sc(-c3nc4c([nH]3)CCNCC4)nc12 to produce COCC(=O)N1CCc2nc(-c3nc4c(OC)ccc(N5CCOCC5)c4s3)[nH]c2CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.