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

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 .