103646-20-4Relevant articles and documents
TWO NAPHTHOQUINONES FROM RUBIA CORDIFOLIA
Koyama, Junko,Ogura, Tamaki,Tagahara, Kiyoshi,Konoshima, Takao,Kozuka, Mutsuo
, p. 2907 - 2908 (1992)
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.