Hydroxyphenylazoformamide derivatives from Calvatia craniformis Takaishi, Yoshihisa ; Murakami, Yoshito ; Uda, Minoru ; Ohashi, Takashi ; Hamamura, Noriko ; Kidota, Masaru ; Kadota, Shigetosi Abstract Publication: Phytochemistry Pub Date: July 1997 DOI: 10.1016/S0031-9422(97)00066-6 Bibcode: 1997PChem..45..997T