Cycloprop-2-ene carboxylic acid

Cycloprop-2-ene carboxylic acid is a mycotoxin found in some mushrooms such as "Russula subnigricans".
When ingested, the molecule is known to cause rhabdomyolysis.
In mice, the oral of this molecule is 2.5 mg/kg and poisoning is indicated by an increase in serum creatine phosphokinase activity. Polymerization via the ene reaction abolishes toxicity.
3-(Cycloprop-2-en-1-oyl)oxazolidinones are a class of ‘unusually stable’ derivatives of cycloprop-2-ene carboxylic acid that have been synthesized by Fox "et al". As mentioned by Fox "et" "al", this class of ‘unusually stable’ derivatives are dienophiles when involved in Diels-Alder Reaction.