Cycloprop 2 ene carboxylic acid

Cycloprop-2-ene carboxylic acid is a mycotoxin found in some mushrooms such as Russula subnigricans and Tricholoma equestre.

When ingested, the molecule is known to cause rhabdomyolysis.

In mice, the molecule is lethal at 2.5 mg/kg of body mass (oral route) and poisoning is indicated by an increase in serum creatine phosphokinase activity. Polymerization via the ene reaction abolishes toxicity.