Grifolin derivatives from Albatrellus caeruleoporus, new inhibitors of nitric oxide production in RAW 264.7 cells. - Quang,D.N.; Hashimoto,T.; Arakawa,Y.; Kohchi,C.; Nishizawa,T.; Somab,G-I.; Asakawa,Y. (Bioorg Med Chem, 2006)