Thongsornkleeb, Charnsak; Rabten, Wangchuk; Ruchirawat, Somsak; Bunrit, Anon; Tummatorn, Jumreang Tetrahedron Letters, 2012 , vol. 53, # 48 p. 6615 - 6619,5 Thongsornkleeb, Charnsak; Rabten, Wangchuk; Bunrit, Anon; Tummatorn, Jumreang; Ruchirawat, Somsak Tetrahedron Letters, 2012 , vol. 53, # 48 p. 6615 - 6619