Constituents of the Chinese Crude Drug „Sāng-Bái-Pí” (Morus Root Bark)

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Abstract
From the benzene extract of the Chinese crude drug “Sāng-Bái-Pí” (Japanese name Sōhakuhi), the root bark of Morus sp. (Moraceae), a novel isoprene substituted flavanone, named sanggenon A, was isolated whose structure was shown to be I on the basis of spectral data. A known isoprene substituted flavone derivative, morusin (II), was also obtained from the extract. 1 Part IX on Constituents of the Cultivated Mulberry Tree. Part VIII: Nomura, T., T. Fukai, J. Matsumoto and T. Ohmori: Planta medica, submitted. 2 A part of this work was reported in a preliminary communication: Heterocycles 14, 1785 (1980).