Structure Isomers and Isomorphism

Organic chemistry is characterized by a cornucopia of different chemical structures. This is largely because the atoms of an organic molecule can be arranged in a variety of different bonding situations. 

the mathematical operation with all combinations of permutations shows the isomorphism of the structures. 

For database handling it is necessary to compare existing database entries with new ones. Consequently, database registration and retrieval are dependent on isomorphism algorithms which compare two graphs or structure diagrams to determine whether subgraphs are identical or not. 

---