Discrete chemical

means a definite chemical structure that can be represented by a definite molecular formula and chemical structure diagram.

The names of chemicals with a distinct chemical identity normally reveal the following structural information:

1. identity of the parent structure
2. identity, number, and position of chemical group(s) attached to the parent structure(s) or to other chemical groups
3. identity and number of counter ions (for salts)
4. stereochemical relationships