Ibotenic acid is a glutamate agonist found in Amanita muscaria mushrooms with chemical formula
C5H6N2O4. Ibotenic acid breaks down into muscimol after dehydration and decarboxylation.
Chemical structure:
H
\
O--C==O
|
H C--H
\ / \
C===C N--H
| | \
C O H
/\\ /
H--O N
Sources:
http://leda.lycaeum.org/Chemicals/Ibotenic_acid.145.shtml
http://www.erowid.org/plants/amanitas/references/journal/1979_mochtar_afghanistan1.shtml