root.Chem = {
  Atom: Atom,
  Bond: Bond,
  Element: Element,
  Data: {
    Elements: Elements
  }
};
})
(this);
root.Chem = {
  Atom: Atom,
  Bond: Bond,
  Element: Element,
  Molecule: Molecule,
  Data: {
    Elements: Elements
  }
};
})
(this);
Add `Molecule` in export object.
Add `Molecule` in export object.
