Three new -kaurane diterpenoids, namely annoglabrin A-C (), were isolated from the fruit pulp. Their structures were clarified by widespread spectroscopic analyses (1D and 2D NMR, HRESIMS). The relative configuration of these new compounds was established through the NOESY spectrum.
View Article and Find Full Text PDFA new pregnane steroid, jasminanthoside (), together with three known compounds, telosmoside A7 (), syringaresinol (), and methyl 6-deoxy-3--methyl--D-allopyranosyl-(1→4)--D-oleandropyranoside () were isolated from the ethyl acetate extract of roots collected in Vietnam. Their chemical structures were elucidated by NMR and MS spectroscopic data analysis along with the comparison of their data with the published ones in the literature. Although was a known compound, its full NMR data were reported for the first time.
View Article and Find Full Text PDF