Morindaquinone, a new bianthraquinone from Morinda coreia roots
2021
Chokchaisiri, Suwadee | Siriwattanasathien, Yuttana | Thongbamrer, Chopaka | Suksamrarn, Apichart | Rukachaisirikul, Thitima
Phytochemical investigation of the roots of Morinda coreia led to the isolation of one new bianthraquinone, morindaquinone (1), together with 12 known compounds, soranjidiol (2), rubiadin-1-methyl ether (3), 2-methoxy-1,3,6-trihydroxyanthraquinone (4), 1-hydroxy-2-methylanthraquinone (5), tectoquinone (6), nordamnacanthal (7), damnacanthal (8), 2-formylanthraquinone (9), 3-hydroxy-2-hydroxymethylanthraquinone (10), lucidin-ω-methyl ether (11), scopoletin (12) and (+)-mellein (13). The structures of these compounds were determined on the basis of extensive spectroscopic analyses, as well as by comparison with literature reports. Compound 1 was the first example of bianthraquinone found in the genus Morinda, whereas compound 13 was firstly isolated from this genus. Among them, compounds 2, 7, 8 and 10 exhibited moderate to weak cytotoxicity against human cervical (HeLa), human colon (HT 29) and human breast (MCF-7) cell lines, while compounds 6 and 9 – 11 showed weak anti-acetylcholinesterase activity.
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