The chemical composition of Ophiopogon japonicus contains ophiopogonin A, B, B', C, C', D, D' (ophiopogonin A, B, B', C, C', D, D'), Ophiopogonone A, B (ophiopogononeA, B), methylophiopogonone A, B (methy-lophiopogononeA, B), dihydroophiopogonone A, B (ophiopogonanoneA, B)