Objective(s) In the present study, the differences in the relaxant effects of aqueous, ethyl acetate and n-butanol fractions of Rosa damascena on tracheal smooth muscle of guinea pigs were examined. Materials and Methods The relaxant effects of three cumulative concentrations of each fraction (0.1, 0.2 and 0.4 g%) in comparison with saline and three cumulative concentrations of theophylline ...

The genus Boswellia is one of the 17 genera belonging to Burseraceae family. In this study resin of Boswellia carteri birdwoodcollected or purchased from Tehram herbal Market as a food and non-food for chemical analysis. The essential oils of the resins of Boswellia carteri birdwoodobtained by different methods of distillation (water distillation, steam distillation and hydro-steam distillation...

Accurate vapor-liquid equilibrium data have been obtained for ethyl acetate + 2-propanol and ethyl acetate + ethanol mixtures at 84.8 kPa, and the results are discussed thermodynamically. The vapor-liquid equilibrium data are correlated with redlich-Kister, Margules, Van-Laar and Ortega, equations the parameters and standard deviation of which are calculated and reported. The best correlati...

In the present study, the antioxidant potential of the crude methanol and its fractionated extracts (hexane, ethyl acetate and water) of the rhizomes of Alpinia mutica was investigated, employing four different assays. The antioxidant assays used were 2, 2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging, β-carotene bleaching, superoxide dismutase (SOD) and the reducing power assays while th...

The title compound, C(19)H(20)O(4), was synthesized via a Fries rearrangement of hydr-oxy benzophenone. The dihedral angle between the least-squares planes of the two benzene rings is 69.04 (11)°. The mol-ecular structure displays an intra-molecular non-classical C-H⋯O hydrogen bond.

In the title compound, C13H13NO3·H2O, the dihedral angle between the ethyl ester group [C-C-O-C(=O); maximum deviation = 0.003 (2) Å] and the quinoline ring system is 7.94 (12)°. The water solvent mol-ecule is linked to the title mol-ecule via O-H⋯O and O-H⋯N hydrogen bonds. In the crystal, mol-ecules are linked by C-H⋯O hydrogen bonds, forming chains propagating along [100].

The asymmetric unit of the title compound, C(10)H(13)NO(3), contains two crystallographically independent mol-ecules with different conformations of the eth-oxy-carbonyl groups; the terminal C-C-O-C torsion angles in the two mol-ecules are 83.6 (6) and -171.1 (3)°, resulting in twisted and straight chain conformations, respectively. The crystal structure is stabilized by inter-molecular N-H⋯O, ...

In the title compound, C(14)H(16)N(2)O(3)S, the phenyl ring and the ethyl 2-(3-formyl-thio-ureido)acetate fragment adopt an E configuration with respect to the C=C bond. An intra-molecular N-H⋯O hydrogen bond generating an S(6) ring motif is observed. In the crystal, mol-ecules are linked by N-H⋯S, C-H⋯S and C-H⋯O hydrogen bonds, forming sheets lying parallel to the ab plane.

This short note describes the synthesis of the title compound through spontaneous aerobic oxidation of ethyl 2-phenyl-2-(thiazol-2-yl)acetate. Due to the prevalence of such functional motifs in biologically active substances, we believe the oxidation encountered highlights an important degradation pathway worthy of note.

phosalone, malathion and diazinon were analyzed in corn oil using solid phase extraction (spe)with lanthanum silicate as a new solid sorbent followed by gas chromatography with nitrogenphosphorus detection (gc-npd). the efficiency of different eluents (methanol, dichloromethane,ethyl acetate, dichloromethane — ethyl acetate (1:1) and ethyl acetate — methanol (1:1)) werecompared for elution of o...