Isolation of naphthazarin from walnut ‘Onigurumi’ and its inhibitory action on oxidative phosphorylation in mitochondria: Akihiro Ohta, P. M. Sivalingam, Sein Lin, Nobuo Ikekawa, Nakatsugu Yaginuma and Yuji InadaToxicon, 1973, 11, 235. (Laboratory of Chemistry of Natural Products, Tokyo Institute of Technology, Ohokayama, Meguroku, Tokyo, Japan; Laboratory of Biological Chemistry, Tokyo Institute of Technology, Ohokayama, Meguro-ku, Tokyo, Japan)