Final answer:
The chemical name of a drug provides its exact composition and is derived from the system of chemical nomenclature, which gives a unique and specific name to each compound.
Step-by-step explanation:
The name for a drug that provides the exact description of the drug's composition is the chemical name.
This term comes from the field of chemical nomenclature, which is a very specific system for naming compounds, ensuring that each substance has a unique and unambiguous name. The chemical nomenclature follows a set of rules that allow scientists and healthcare professionals to identify compounds precisely. While the generic name is the name given to a drug that is not protected by a brand or trade name and is typically the name of the active ingredient, the chemical name goes further to detail the exact structure and composition of the drug.