SciFinder-n is one of the most comprehensive databases for the chemical literature. You can search by topic, author, substances by name or CAS Registry Number. Using the CASDraw Editor, ChemDoodle if you're on a tablet, or by importing from ChemDraw, you can also search by chemical structures, substructures, or reactions.
It's a core research tool for chemistry, biochemistry, chemical engineering, materials science, nanotechnology, physics, environmental science and other science and engineering disciplines. Depending on your research, SciFinder-n is complementary to other databases like Reaxys, Web of Science, PubMed, Compendex and INSPEC.