O-chaconine

The fruit of a number of solanaceous plants, including tomato Lycopersicon esculentum), potato Solanum tuberosum) and eggplant Solarium melongena esculentum), have cholinesterase-inhibiting effects (Krasowski et al. 1997). They contain solanaceous glycoalkaloids o-solanine and o-chaconine, which are triglycosides of solanidine, a steroidal alkaloid derived from cholesterol. They are the only plant chemicals known to inhibit both acetlycholinesterase and butyrylcholinesterase, both in vitro and in vivo. 

Fig. 10.9. Separation of glyco-alkaloids of the o-chaconine and o-solanine series ...

Peaks 1, a-solanine 2, S-solanine 3, y-solanine 4, o-chaconine 5, Bpchaconine 6,... 

---