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Two new pyranoanthraquinones, rennellianone A (1) and rennelianone B (2) along with four known compounds, alizarin-1-methyl ether (3), scopoletin (4), 4-hydroxy-3,5-dimethoxybenzaldehyde (5) and 3b-acetateoleanan-13b, 28-lactone (6) were isolated and characterized from the root extract of Rennellia elliptica. The structures were established based on spectroscopic data including HR-ESI–MS, 1D and 2D...
Root decoctions of anthraquinone-containing plants are often taken as postpartum tonic and aphrodisiac. Anthraquinones are known for their diverse biological activities, especially antioxidant and anticancer. A series of 35 anthraquinones was generated by isolation from Rubiaceae plants and synthesis. Their UV/vis spectrum depends on the nature and relative positions of auxochromic substituents on...
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