Pyrrolizidine alkaloids from Planchonella species (family Sapotaceae). I. The alkaloids of Planchonella thyrsoidea C. T. White and P. anteridifera (White & Francis) H. J . Lam

Abstract

Planchonelline, Cl₂H₁₉0₂NS, a, major alkaloid of the leaves of Planchonella thyrsoidea C. T. White and P. anteridifera (White & Francis) H. J. Lam., is the trans-β-methylthioacrylate ester of laburnine((+)-trachelanthamidine). In both species it occurs together with the tiglate and benzoate of laburnine, but only the tiglate and benzoate were isolated from stored dried leaves of P. anteridifera.