Chemistry

Three new electronic transitions of CoS probed by LIF and DF spectroscopy
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...


Olimorphism and optical properties in
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...
New Eunicellin Diterpenes and 9,10-Secosteroids from the Gorgonian Muricella sibogae
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...
Two New Lycopodium Alkaloids from Lycopodium obscurum
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...
Base Properties of Adenosine 5′-Monophosphate, Guanosine 5′-Monophosphate, and Inosine 5′-Monophosphate in Aqueous Solutions of Methanol
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...
Two Halogenated Sesquiterpenoids from the Fruits of Alpinia oxyphylla
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...


Phytochemical Investigation by Microwave-Assisted Extraction of Essential Oil of the Leaves of Walnut Cultivated in Algeria
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...
New Secondary Metabolites from Allium victorialis
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.
Biotransformation of Jervine by Cunninghamella echinulata
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...
Primary Studies on Variation in Position of Trifluoromethyl Groups in Several Aromatic Group-14 Derivatives by 19F-NMR Spectroscopy
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...
Miyaura Cross-Coupling Reaction Catalyzed by Dinuclear Palladium Complexes
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 ...


Hypenol, a New Lignan from Hypenia salzmannii
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 ...
Triterpenoids from the Roots of Camellia oleifera C.Abel and Their Cytotoxic Activities
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...
Organic Stereochemistry. Part 6
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...
Juglanones A and B: Two Novel Tetralone Dimers from Walnut Pericarp (Juglans regia)
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...