common allosteric binding site of muscarinic M2 receptors, the orthosteric site of which was liganded with the N-methylscolopamine. The phthalimido substituted hexane-bisammonium compoundW84 served as a starting point. Previous molecular modelling studies revealed two positive charges and two aromatic imides in a sandwich-like arrangement to be essential for a high allosteric potency. A three-dimensional
Contribution of Lateral Substituents in Symmetrical and Non-symmetrical Heptane-bisammonio Compounds to the Allosteric Stabilization of N-methylscopolamine Binding to Muscarinic M2 Receptors
Allosteric modulators are able to enhance or decrease the equilibrium binding of orthosteric agonists or antagonists. The treatment of Alzheimer's disease and the organophosphorus poisoning can take advantage of the enhancement of the ligand binding. Prerequisite is the formation of ternary complexes consisting of the receptor protein, the orthosteric ligand, e. g. N‐methylscopolamine (NMS), and the
Modified cis-1,4-polyisoprene rubber, a process for its manufacture, a vulcanized modified cis-1,4-polyisoprene rubber composition and the use of the modified cis-1,4-polyisoprene rubber for preparing vulcanized shaped articles
申请人:KURARAY CO., LTD.
公开号:EP0066241A2
公开(公告)日:1982-12-08
Described is a modified cis-1,4-polyisoprene rubber on the basis of a solid synthetic cis-1,4-polyisoprene containing in its molecule per 100 repeating isoprene units at least 0.01 mole of a succinimide derivative of the general formula I
wherein R1 is hydrogen or a covalent bond with the rubber molecule, R2 is a hydrocarbon residue having not more than 20 carbon atoms, and optionally containing an oxygen or sulfur atom in its principal chain, and A is a dihydrocarbylamino residue having not more than 20 carbon atoms, and containing at least one tertiary nitrogen atom as a hetero atom. This modified rubber exhibits excellent green strength at room temperature and flowability at elevated temperatures. In its vulcanized form it is comparable to, or better than vulcanized natural rubber in tensile strength and hardness.
Disclosed are positively-charged toner compositions comprised of resin particles, pigment particles, and imide charge-enhancing additives of the formula:
wherein R,, R2, and R3, are alkyl groups containing from 1 carbon atom to about 25 carbon atoms, R4 is hydrogen, nitro, halogen, amino, or alkyl, and A is an anion.
HYDROCARBYL SOLUBLE QUATERNARY AMMONIUM CARBOXYLATES AND FUEL COMPOSITIONS CONTAINING THEM
申请人:Afton Chemical Corporation
公开号:EP2960319A2
公开(公告)日:2015-12-30
A fuel additive composition, fuel composition, method of improving the injector performance of a fuel injected engine, method for preventing or cleaning up deposits in an engine or fuel system, method of reducing wear in a fuel system of an engine, and method of improving the demulsibility of a fuel composition. The fuel composition includes from about 5 to about 300 ppm by weight based on a total weight of the fuel composition of a hydrocarbyl soluble quaternary ammonium carboxylate derived from a quaternary ammonium carbonate and an organic acid.