Beilstein database

The Beilstein database is one of the largest organic chemistry, in which compounds are uniquely identified by their Beilstein Registry Number. The database covers the scientific literature from 1771 to the present and contains information on 9.8 million substances, 10.3 million chemical reactions and 2 million original scientific publications. The electronic database was created from Beilstein's Handbook of Organic Chemistry, founded by Friedrich Konrad Beilstein in 1881, and is maintained by the Frankfurt Office of Elsevier MDL.