Abietane Diterpenoids from the Cones of Larix kaempferi and their Inhibitory Effects on Epstein-Barr Virus Activation - Ohtsu, Hironori; Tanaka, Reiko; In, Yasuko; Matsunaga, Shunyo; Tokuda, Harukuni; Nishino, Hoyoku (Planta Medica, 2001)