ABSTRACT
Many are saponins containing an additional acyl group; the rest have glucose at carbon 27.1 This class of steroid derivative is largely restricted in distribution to the genera Acnistus, Datura, Discopodium, Dunalia, Jaborosa, Lycium, Nicandra, Physalis, Solanum, and Withania, all belonging to the plant family Solanaceae.2
