Three new diterpene esters with a myrsinol-type skeleton have been isolated from Euphorbia decipiens BOISS. & BUHSE. The structure elucidation of the isolated compounds was based primarily on two-dimensional (2D)-NMR techniques including correlation spectroscopy (COSY), heteronuclear multiple quantum coherence (HMQC), heteronuclear multiple bond correlation (HMBC) and nuclear Overhauser effect ...

Ursolic acid (1) and a new flavanone, 5-O-(6-rhamnosylglucoside)-7-hydroxy-4'-methoxyflavanone (2), were isolated from the leaves of Salvia elegans Vahl. These natural products displayed antidepressant activity in mice as determined by means of a forced swimming test (FST) evaluation. Structural elucidation was carried out by chemical derivatization (acetylation) and spectroscopic analyses, suc...

Abstract Heteronuclear calcium–iron carbonyl cation complexes in the form of [CaFe(CO) n ] + ( =5–12) are produced gas phase. Infrared photodissociation spectroscopy conjunction with quantum chemical calculations confirm that =10 complex is coordination saturated ion where a Fe(CO) 4 fragment bonded Ca(CO) 6 through two side‐on bridging ligands. Bonding analysis indicates it best described by b...

Two heteronuclear proton-carbon NMR experiments are applied to the DNA-octamer d(TTGGCCAA)2 with carbon in natural abundance. They lead to a complete assignment of the carbon resonances of the sugars and bases. In addition, several heteronuclear coupling constants, proton-carbon as well as proton-phosphorous and phosphorous-carbon, were determined. The information can be obtained in a reasonabl...

We present the formation of homonuclear ${\mathrm{Cs}}_{2}$, ${\mathrm{K}}_{2}$, and heteronuclear CsK long-range Rydberg molecules in a dual-species magneto-optical trap for $^{39}\mathrm{K}$ $^{133}\mathrm{Cs}$ by one-photon UV photoassociation. The different ground-state-density dependence homo- photoassociation rates detection stable molecular ions resulting from autoionization provide an u...

Two new 5-deoxyflavonoids, 7,2',3',4'-tetramethoxyflavone (1) and 7,2',3',4'-tetramethoxyflavanone (2) together with a known flavone 7,4'-dimethoxy-3'-hydroxyflavone (3) were isolated from the whole plant of Calliandra inermis. The structures of these new compounds were elucidated by high resolution electron impact mass spectrometry (HR-EI-MS) and 1D and 2D-NMR spectral studies including 1H-1H ...

Heteronuclear molecules attract wide attention due to their permanent electric dipole moments. Analogous to atoms with magnetic dipoles, the existence of nonzero electric dipoles significantly enhance possibilities and mechanisms for control and design of quantum degenerate molecule systems with electric (E-) fields. This work proposes a vortex creation mechanism inside a condensate of heteronu...