X-Ray crystal and molecular structure of nirurine, a novel alkaloid related to the securinega alkaloid skeleton, from Phyllanthus niruri(Euphorbiaceae)

Abstract

Nirurine, an alkaloid from the aerial parts of Phyllanthus niruri L. (Euphorbiaceae), was shown by single-crystal X-ray crystallography to possess the structure (2). Through extensive decoupling experiments a complete n.m.r. assignment of all of the protons and carbons in nirurine has been achieved.