Ginkgolide
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Ginkgolides are biologically active terpenic lactones present in Ginkgo biloba. It is a diterpenoid, i.e. it has 20-carbon skeleton and is synthesized from geranylgeranyl pyrophosphate.
| R1 | R2 | R3 | |
| A | OH | H | H |
| B | OH | OH | H |
| C | OH | OH | OH |
| J | OH | H | OH |
| M | H | OH | OH |


