From Wikipedia:

http://en.wikipedia.org/wiki/LSD


D-Lysergic acid diethylamide
or:
(6aR,9R)-N,N-diethyl-7-methyl-
4,6,6a,7,8,9-hexahydroindolo
[4,3-fg]quinoline-9-carboxamide

Chemical formula C20H25N3O

Molecular mass 323.43 g/mol

Melting point 80 - 85 °C

The United Nations Convention on Psychotropic Substances (adopted in
1971) requires its parties to prohibit LSD. Hence, it is illegal in
all parties to the convention, which includes the United States,
Australia and most of Europe.