Using CSc1ncc2c(=O)oc(=O)n(Cc3ccc4c(c3)OCO4)c2n1, CCOC(=O)CC(=O)OCC to produce CCOC(=O)c1c(O)c2cnc(SC)nc2n(Cc2ccc3c(c2)OCO3)c1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.