S. Attaurrahman,"malik et al., NIGELLIDINE - A NEW INDAZOLE ALKALOID FROM THE SEEDS OF NIGELLA-SATIVA, Tetrahedron letters, 36(12), 1995, pp. 1993-1996
Nigellidine (1), only the second example of a natural product containi
ng an indazole nucleus, was isolated from Nigella sativa and character
ized by spectroscopic and X-ray diffraction techniques.