Source:http://linkedlifedata.com/resource/umls/id/C0036248
MSH: A compound that contains a reduced purine ring system but is not biosynthetically related to the purine alkaloids. It is a poison found in certain edible mollusks at certain times; elaborated by GONYAULAX and consumed by mollusks, fishes, etc. without ill effects. It is neurotoxic and causes RESPIRATORY PARALYSIS and other effects in MAMMALS, known as paralytic SHELLFISH poisoning.,CSP: powerful heat stable neurotoxin synthesized and secreted by certain dinoflagellates, which accumulates in the tissues of bivalve mollusks feeding on the dinoflagellates, and can cause a severe toxic reaction in animals consuming these shellfish.