The Spectrum Collection
2000 biologically active and structurally diverse compounds from our libraries of known drugs, experimental bioactives, and pure natural products. Refs: J Virology 77: 10288 (2003); Ann Rev Med 56: 321 (2005) .

US Drug Collection
An important collection of 1040 drugs that have reached clinical trial stages in the USA. Each compound has been assigned USAN or USP status and is included in the USP Dictionary (U.S. Pharmacopeia), the authorized list of established names for drugs in the USA.

International Drug Collection
Includes 240 drugs that are marketed in Europe and/or Asia but have not been introduced in the US. Such compounds have received INN, BAN and/or JAN designations, and are listed in the Index Nominum, the International Drug Directory.

Pure Natural Products
The ultimate in chemical diversity, now expanded to 800 compounds in 10mM. An unique collection of pure natural products and their derivatives. The collection includes simple and complex oxygen heterocycles, alkaloids, sequiterpenes, diterpenes, pentercyclic triterpenes, sterols, and many other diverse representatives.

The Killer Plates
Reference collection of 160 synthetic and natural toxic substances (plates A and B). An unprecedented opportunity to tease and test your assay. Inhibitors of DNA/RNA synthesis, cellular respiration, membrane integrity and much more.