Tubeimoside I, a new cyclic bisdesmoside from Chinese cucurbitaceous folk medicine “Tu Bei Mu”, a tuber of Bolbostemma paniculatum. - Kasai ,R,.; Miyakoshi ,M,.; Matsumoto ,K,.; Nie ,R,.; Zhou ,J,.; Morita ,T,.; Tanaka ,O.. (Chem. Pharm. Bull., 1986)