Using [NH4+], CCCn1c(COCC)nc2cnc3ccc(OCc4ccccc4)cc3c21 to produce CCCn1c(COCC)nc2c(N)nc3ccc(OCc4ccccc4)cc3c21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.