Dehydrotrametenonic acid and dehydroeburiconic acid from Poria cocos and their inhibitory effects on eukaryotic DNA polymerase α and β. - Akihisa,T.; Mizushina,Y.; Ukiya,M.; Oshikubo,M.; Kondo,S.; Kimura,Y.; Suzuki,T.; Tai,T. (Biosci Biotechnol Biochem, 2004)