1[1]Tada A,Shojl J.Studies on the Constituents of Ophiopogonis Tuber Ⅱ.on the Structure of Ophiopogonin B.Chem Pharm Bul1,1972,20(8):1729-1734.
2[2]Tada A,Kobayashi M,Shoji J.Studies on the Constituents of Ophiopogonis Tuber Ⅲ.on the Structure of Ophiopogonln D.Chem Pharm Bul1,1973,21(2):308-311.
3[3]atanabe Y,Sanada S,Tada A,et al.Studies 0n the Constituents of Ophiopogonis Tuber.Ⅳ.on the Structure of Ophiopogonin A,B′,C,C′and D′.Chem.Phann.Bul1,1977,25(11):3049-3055.
