Scabronins B, C, D, E and F, novel diterpenoids showing stimulating activity of nerve growth factor-synthesis, from mushroom Sarcodon scabrosus - Kita,T.; Takaya,Y.; Oshima,Y.; Ohta,T.; Aizawa,K.; Hirano,T.; Inakuma,T. (Tetrahedron, 1998)