Carotatoxin is a poison

Poison

In the context of biology, poisons are substances that can cause disturbances to organisms, usually by chemical reaction or other activity on the molecular scale, when a sufficient quantity is absorbed by an organism....

ous polyyne

Polyyne

The polyynes are a group of organic compounds with alternating single and triple bonds. The simplest example is diacetylene or buta-1,3-diyne, HC≡C-C≡CH....

 and alcohol

Alcohol

In chemistry, an alcohol is an organic compound in which the hydroxy functional group is bound to a carbon atom. In particular, this carbon center should be saturated, having single bonds to three other atoms....

 found in carrot (Daucus carota). It is structurally related to the oenanthotoxin

Oenanthotoxin

Oenanthotoxin is a toxin extracted from hemlock water dropwort and other plants of the genus Oenanthe. It is a central nervous system poison, and acts as a noncompetitive gamma-aminobutyric acid antagonist. This toxin played some role in euthanasia in ancient Sardinia, for inducing risus...

 and cicutoxin

Cicutoxin

Cicutoxin is a poisonous polyyne and alcohol found in various plants, most notably water hemlock . It is structurally related to the oenanthotoxin of hemlock water dropwort....

. It occurs approximately in a concentration of 2 mg/kg.

Normal consumption of carrots doesn't causes any toxic effect in humans. However, when the carotatoxin is delivered in high doses to laboratory animals
causes neurotoxical problems.