In chemistry, formulas are often used for the preparation of chemical compounds. These formulas can be represented as molecular formulas or as a chemical structure:
C5H5N7
Molecular Formula
Specific Structure
aryl-amino
Generic Structure (Markush structure)
The search for chemical compounds, the chemical structure search, requires the search for all different variants of chemical structures. There are special databases for this purpose, such as REGISTRY®, MARPAT®, DCR®, PubChem® and others.