1. 1) Su B-N, Takaishi Y, and Kusumo T, Tetrahedron, 55, 14571–14586 (1999).
2. 2) Yamauchi S, Sugahara T, Akiyama K, Maruyama M, and Kishida T, J. Nat. Prod., 70, 549–556 (2007).
3. 3) Akiyama K, Yamauchi S, Maruyama M, Sugahara T, Kishida T, and Koba Y, Biosci. Biotechnol. Biochem., 73, 129–133 (2009).
4. 4) Ishibashi F and Taniguchi E, Phytochemistry, 49, 613–622 (1998).
5. 5) Kim KH, Moon E, Kim SY, and Lee KR, J. Agric. Food Chem., 58, 4779–4785 (2010).