{
  "(=O)": 28996,
  "(C)": 28999,
  "(Cl)": 29002,
  "(F)": 28998,
  "(I)": 29011,
  "(O)": 29012,
  "(OC)": 28997,
  "([N+]([O-])=O)": 29003,
  "C#N": 29007,
  "N#C": 29010,
  "[C@@H]": 29004,
  "[C@H]": 29006,
  "[NH3+]": 29000,
  "[Na+]": 29009,
  "[O-]": 29008,
  "c1": 29001,
  "c2": 29005
}