Scabronine A, a novel diterpenoid having potent inductive activity of the nerve growth factor synthesis, isolated from the mushroom Sarcodon scabrosus - Ohta,T.; Takako,K.; Norihiro,K.; Obara,Y.; Norimichi,N.; Yasushi,O.; Yoshiaki,T.; Yoshiteru,O. (Tetrahedron Lett, 1998)