The role of a tantalum interlayer in enhancing the properties of FeO thin films.

High spin polarization and low resistivity of FeO at room temperature have been an appealing topic in spintronics with various promising applications. High-quality FeO thin films are a must to achieve the goals. In this report, FeO films on different substrates (SiO/Si(100), MgO(100), and MgO/Ta/SiO/Si(100)) were fabricated at room temperature with radio-frequency (RF) sputtering and annealed at 450 °C for 2 h.

Jasminanthoside - a new pregnane-steroid from .

A 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.

Lasibidoupins A and B, two new compounds from the stems of V.S. Dang & Naiki.

From the stems, two new compounds, including one new 9,10-anthraquinone, lasibidoupin A (), and one new 6,7-benzocoumarin, lasibidoupin B (), together with one known compound, 11--methyldamnacanthol () were isolated using chromatographic method. Their structures were determined by extensive HRMS, and NMR assignments. Compound was reported for the first time from this species.

A new oleanane-skeleton triterpene isolated from .

Extensive fractionation of -hexane extract from the dried powdered-trunks of Pierre ex A.Froehner (Rubiaceae) led to the isolation of a new oleanane-skeleton triterpene, coffecanolic acid (), along with three known analogues sumaresinolic acid (), oleanolic acid (), and 3--acetyloleanolic acid (). The chemical structures were elucidated using FT-IR, 1D and 2D NMR and HR-ESI-MS data analysis.