Using COc1cnc(N2CCOCC2)c2sc(N)nc12, COCCC(=O)O to produce COCCC(=O)Nc1nc2c(OC)cnc(N3CCOCC3)c2s1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.