5-O-glucosyldihydroflavones from the leaves of Helicia cochinchinensis |
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Authors: | Morimura Ken-ichi Gatayama Asuka Tsukimata Reiki Matsunami Katsuyoshi Otsuka Hideaki Hirata Eiji Shinzato Takakazu Aramoto Mitsunori Takeda Yoshio |
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Institution: | Department of Pharmacognosy, Graduate School of Biomedical Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan. |
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Abstract: | From the leaves of Helicia cochinchinensis, collected on Okinawa Island, seven phenolic glucosides and two terpenic glucosides were isolated. Five of the phenolic glucosides were previously known, being identified with p-coumaric and ferulic acids glucosyl esters, rhodioloside, helicidiol, and naringenin 5-O-beta-D-glucopyranoside. The structures of two other phenolic glucosides, named heliciosides A and B, were elucidated to be 5-O-beta-D-glucosides of 3-hydroxyflavanone, namely aromadendrin and taxifolin, by means of spectroscopic analyses. The two terpenic glucosides were identified with ampelopsisionoside and icariside C1. |
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Keywords: | Helicia cochinchinensis Proteaceae Flavanonol glucoside Heliciosides A and B Helicidol Alloside |
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