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Three previously undescribed diterpenoids, helioscopnoids A–C, and eight known compounds were isolated from the whole plants of Euphorbia helioscopia. Their structures were established by extensive analysis of spectra and data comparison with previous literatures. Among them, compound 4 was identified as 24,24‐dimethoxy‐25,26,27‐trinoreuphan‐3β‐ol with revised configurations of C‐13, C‐14, and C‐17...
Five novel iridoid glycosides, avellanedaesides A‐E (1 – 5) were isolated from the H2O extract of Tabebuia avellanedae. Their structures were determined on the basis of NMR and MS analysis. Isolated compounds suppressed inflammatory cytokine, tumor‐necrosis factor‐α and interleukin‐1β production in cultured human myeloma THP‐1 cells co‐stimulated with lipopolysaccharide (LPS). In addition, the study...
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