Phytochemistry p. 2907 - 2908 (1992)
Update date:2022-08-11
Topics:
Koyama, Junko
Ogura, Tamaki
Tagahara, Kiyoshi
Konoshima, Takao
Kozuka, Mutsuo
The methanol extract of Rubia cordifolia afforded two new naphthoquinones, 2-carbamoyl-3-methoxy-1,4-naphthoquinone and 2-carbamoyl-3-hydroxy-1,4-naphthoquinone, isolated along with a known naphthoquinone and naphthohydroquinone and six known anthraquinones.The structures of the new compounds were determined on the basis of spectroscopic data and direct comparison with synthetic compounds. Key words: Rubia cordifolia; Rubiaceae; Rubiae radix; naphthoquinone; anthraquinone.
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