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From the n-BuOH-soluble extract of the whole plant of Centipeda minima (Asteraceae), the investigation on chemical constituents led to the isolation of three new compounds including 3′-desulphatedatractyloside (1), 15-O-[α-l-rhamnosyl-(1→2)-β-d-glucosyl]grandiflorolic acid (2), and 2α-hydroxylemmonin C (3), along with five known compounds (4–8). Their structures were elucidated on the basis of the...
Three new cleistanthane diterpenes named tomocinon (1), tomocinol A (2), and tomocinol B (3), were isolated from the EtOAc extract of the seed of Caesalpinia sappan. Their structures were determined by extensive NMR spectroscopic analysis. The absolute stereochemistry of tomocinon (1) has been established by CD spectroscopic analysis. Cleistanthane diterpenes (1–3) represents the novel class of antiausterity...
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