Abstract
Two new steroid glycosides, linckosides L1 (1) and L2 (2), were isolated, along with the previously known echinasteroside C (3) from the ethanolic extract of the Vietnamese blue starfish, Linckia laevigata. The structures of the new compounds were elucidated by spectroscopic methods (mainly 2D NMR) and chemical transformations. Lifetime observations and analyses of silver impregnated preparations on the culture of neuroblastoma C-1300 cells showed that glycosides 1, 2, and 3 are capable of inducing neuronal differentiation similar to that of neurotrophins and of enhancing substantially the neuritogenic activity of NGF.
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