Reaxys, by Elsevier, is the web version of the printed Beilstein Handbook series, and has expanded to include substances beyond organic chemistry such as inorganic complexes and biological chemicals.
Reaxys allows you to search for chemical structures, chemical properties, chemical spectra, and chemical reactions.
Reaxys Training and Support - provides an FAQ, webinars, guides to content, and technical specifications.
Need more help? Contact the Chemistry Librarian (firstname.lastname@example.org).