Molecule->Create creates a new molecule.
Molecule
The 
Molecule entry provides a name for the molecule object.
This is optional: when empty (or filled with separator characters, 
as space, tab, newline), the molecule will be named Molecule.
Object identification is explained in 
Introduction Identification.
A molecule is a container whose primary purpose is to contain other objects. 
When a molecule is created, it has no child objects and consequently no visual 
representation. The only way to select an empty molecule is therefore to write 
its identification or to use the mechanisms provided by 
Molecule Select.
To avoid this problem, when 
Ok is pressed and the new molecule is created, 
the 
Molecule Create dialog is automatically replaced by the 
Molecule Link
dialog, with the new molecule identification already inscribed on it. How to link 
objects to a molecule (TODO) is described in the section 
Molecule Link.