submitted by MuhaJova 33 minutes ago
The laser-induced fluorescence excitation spectrum of jet-cooled CoS molecules has been recorded in the energy range of 20100–22600 cm-1. Twenty one bands have been assigned as three transition progressions: [21.58] 4Φ9/2(υ′ = 0 – 2) – A4Φ9/2(υ′′ = 0–3), [21.65] 4Δ7/2(υ′ = 0...
submitted by shohed 2 hours ago
The solvothermal synthesis and characterization of two indium selenides with stoichiometry [NH4][InSe2] is described. Yellow [NH4][InSe2] (1), which exhibits a layered structure, was initially prepared in an aqueous solution of trans-1,4-diaminocyclohexane, and subsequently using a concentrated a...
submitted by koloemade 2 hours ago
Bioactivity-guided isolation of the rare gorgonian Muricella sibogae (Nutting) yielded the two new eunicellin diterpenes sibogin A and B (1 and 2), the three new 9,10-secosteroids sibogol A–C (6–8), together with the three known eunicellin diterpenes 3–5 and the five known 9,10-secosteroids...
submitted by VincBron 2 hours ago
Two new Lycopodium alkaloids, (+)-cermizine D N-oxide (1) and (8β)-8-(acetyloxy)obscurumine A , along with five known compounds, were isolated from the crude alkaloid portion of Lycopodium obscurum. Their structures were elucidated on the basis of spectroscopic data and chemical correlation. All...
submitted by BabyJamari 2 hours ago
The protonation constants of adenosine 5′-monophosphate, guanosine 5′-monophosphate, and inosine 5′-monophosphate were determined in binary mixtures of H2O containing 0, 10, 15, 20, 25, 30, 35, 40, 45, and 50% MeOH, using a combination of potentiometric and spectrophotometric methods at a c...
submitted by drrlawry 2 hours ago
Two new halogenated eremophilane-type sesquiterpenoids, (11S)- and (11R)-12-chloronootkaton-11-ol (1 and 2, resp.), together with five known sesquiterpenoids, nootkatone , 7-epiteucrenone B , oxyphyllenodiol A , oxyphyllenodiol B , and alpinenone , were isolated from the EtOH extract of the fruit...
submitted by stivarina2 2 hours ago
Walnut (Juglans regia L.) leaves are used traditionally as an herbal tea indicated for non-insulin-dependent diabetics. In recent years, the type-II diabetes is occurring worldwide with increasing frequency. Thus, there is an urgent need to explore the new beneficial biomolecules on the human hea...
submitted by mizshf 2 hours ago
Allumines A and B (1 and 2, resp.), two new steroidal alkaloids, and a new cyclopentene derivative, 3, were isolated from the CHCl3-soluble fraction of the whole plant of Allium victorialis. Their structures were elucidated by spectroscopic techniques, including 1D- and 2D-NMR spectroscopy.
submitted by gom 2 hours ago
Biotransformation of jervine (1) by Cunninghamella echinulata (ACCC 30369) was carried out. Four biotransformation products were obtained, and three of them, 3–5, were identified as new compounds. On the basis of their NMR and mass-spectral data, their structures were characterized as jervinone...
submitted by camineas 2 hours ago
Variation in the position of CF3 groups in several aromatic Group-14 compounds was studied by 19F-NMR spectroscopy. In these compounds RnECl4−n (n=1 or 2; E=Si, Ge, or Sn; R=2,4,6-(CF3)3C6H2 (=Ar), 2,6-(CF3)2C6H3 (=Ar′), or 2,4-(CF3)2C6H3 (=Ar″)), Ar, Ar′, and Ar″ are all bulky, strongl...
submitted by kvraam32 2 hours ago
Miyaura coupling reaction catalyzed by dinuclear palladium complexes gave cine-substitution products along with ordinary ipso-substitution products. In the reaction in (D6)benzene, the ipso position of the cine-substitution product was highly deuterated. The H/D exchange also occurred in various ...
submitted by oberd 2 hours ago
A new lignan, (−)-secoisolariciresin-9-yl 6-O-p-coumaroyl-β-D-glucopyranoside (1), named hypenol, along with eleven known compounds, i.e., hyperin, rosmarinic acid, methyl rosmarinate, a mixture of the triterpenes betulinic acid, ursolic acid, and oleanolic acid, glycosylated β-sitosterol, a ...
submitted by ramada12 2 hours ago
Three new triterpenoids, 21β,22α-diangeloyloxy-3β,15α,16α,28-tetrahydroxyolean-12-en-23-al (1), 21β-angeloyloxy-3β,15α,16α,28-tetrahydroxy-22α-(2-methylbutanoyloxy)olean-12-en-23-al , and 21β-angeloyloxy-3β,16α,28-trihydroxy-22α-(2-methylbutanoyloxy)olean-12-en-23-al , along with si...
submitted by warldcev 2 hours ago
Following the previous Part on the mechanisms of chiral recognition in pharmacology, the road was open to cover one aspect of stereoselectivity that had been evoked in Part 5 but not discussed explicitly, namely the pharmacological significance of the conformational behavior of active molecules...
submitted by nilo40 2 hours ago
Two novel tetralone dimers, with an O-bridge, named juglanones A and B (1 and 2, resp.), were isolated from the AcOEt extract of walnut pericarps. These compounds are the first examples of O-bridged dimeric tetralones. Their structures were determined by spectroscopic methods, including HR-TOF-MS...