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The horminone (C 20 H 28 O 4, M r =332.85) was first isolated from the leaves of Rabdosia Serra (Maxim) Hara and its crystal structure was determined by X ray diffraction method. Horminone is orthorhombic with space group P2 1P2 1P2 1, a=7.7186(7), b=9.5506(9), c=24.227(2) , V=1785.9(3) 3, Z=4, D c =1.236 g/cm 3, λ=0.71073 , μ (Mo Kα )=0.085mm -1 , F (000)=720. The structure was refined to R=0.0369, wR= 0.0978 for 2446 reflections with I>2σ(I ). X ray diffraction analysis reveals that there are three six membered rings in the title molecule. Ring A is in the chair conformation, ring C has the structure of quinone and there are two intermolecular hydrogen bonds between two molecules.
The horminone (C 20 H 28 O 4, M r = 332.85) was first isolated from the leaves of Rabdosia Serra (Maxim) Hara and its crystal structure was determined by X ray diffraction method. Horminone is orthorhombic with space group P2 1P2 1P2 1 , a = 7.7186 (7), b = 9.5506 (9), c = 24.227 (2) , V = 1785.9 (3) 3, Z = 4, D c = 1.236 g / cm 3, λ = 0.71073 , μ (Mo Kα) = 0.085 mm -1, F (000) = 720. The structure was refined to R = 0.0369 and wR = 0.0978 for 2446 reflections with I> 2σ (I). Xray diffraction analysis reveals that there are three six membered rings in the title molecule. Ring A is in the chair conformation, ring C has the structure of quinone and there are two intermolecular hydrogen bonds between two molecules.