Two new homoisoflavonoids ophiopogonone D (1) and ophiopogonanone G (2) were isolated from the fibrous roots of Ophiopogon japonicus. The structures of these two compounds were determined on the basis of spectroscopic means including HR-ESI-MS, 1D, and 2D NMR experiments. The cytotoxic activities of 1 and 2 against Hela and Hep2 cells are described.
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Duan et al. (2009) studied this question.
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