ginkgolide
ginkgolide
Organic heterohexacyclic compounds that are diterpenoid trilactones found in the ginkgo tree (also known as the maidenhair tree, <em>Ginkgo biloba</em>). They have a cage skeleton consisting of six 5-membered rings (a spiro[4.4]nonane carbobicyclic ring, three lactones and a tetrahydrofuran ring) which includes a <em>tert</em>-butyl substituent. The ginkolides vary only in the number and positions of their hydroxy substituents.