A New Diepoxy-ent-kauranoid, Rugosinin, from Isodon rugosus - Abbaskhan, Ahmed; Choudhary, MIqbal; Tsuda, Yoshisuke; Parvez, Masood; Atta-ur-Rahman; Shaheen, Farzana; Parween, Zeba; Tareen, RasoolBaksh; Zaidi, MudassirAsrar (Planta Medica, 2003)