SciFindern, new version of SciFinder, is a “research discovery application that provides access to the world's most comprehensive and authoritative source of references, substances and reactions in chemistry and related sciences”.
Visit the page Content at a Glance for the coverage. You can search for substances, reactions, patents and journal references.
SciFindern requires an individual username and password, the same as SciFinder. Only one login ID per user is allowed.
ChemSpider is a free chemical structure database providing fast access to over 30 million structures, properties and associated information. By integrating and linking compounds from more than 470 data sources, ChemSpider enables researchers to discover the most comprehensive view of freely available chemical data from a single online search. It is owned by the Royal Society of Chemistry.