This article is from the Chemistry FAQ, by Bruce Hamilton B.Hamilton@irl.cri.nz with numerous contributions by others.
Merck, Heilbron and Beilstein all provide information on drugs that have
a significant presence in the market. Lesser-known homebake and analogues
are usually not covered, and a search of Chemical Abstracts may not even
provide information. Because of the various techniques used to "refine"
and "cut" the active ingredients, most illegal drugs are seldom
sufficiently pure to match published data. The drugs are marketed on their
pharmacological and psychological activity, rather than chemical purity
- similar to vitamin units of activity :-). I suggest you start by reading
the various alt.drugs FAQs - they all list hardcopy references, and if they
do not identify an information source, try posting to alt.drugs or rec.drugs.
 
Continue to: