Using C[C@H]1COCc2nc3c(N)nc4cc(/C=C/C(=O)N(C)C)ccc4c3n21 to produce C[C@H]1COCc2nc3c(N)nc4cc(CCC(=O)N(C)C)ccc4c3n21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.