TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation (Disclosed): Preparation of (I) comprises reacting a substituted 2-hydroxy-1,2-diphenyl-ethanone compound of formula (II) with a keto ester compound of formula (Re-O-C(=O)-CH2-C(=O)-Y1) (III) in the presence of an organic or inorganic base (preferably sodium methanolate or sodium ethanolate) and a solvent (preferably methanol or ethanol).Re = 1-6C alkyl; andY1 = OR1a or N(R2a)(R3).Preferred Composition: The composition further comprises (c) an additive and (d) a second additive. The weight ratio of component (b) to component (c) is 4:1-1:20. Preferred Components: The component (b) is contained at 0.0005-10% based on the weight of component (a). The additive is a phosphite or phosphonite, an acid scavenger, a phenolic antioxidant or an aminic antioxidant.    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The organic material is a polymer, a wax, a mineral oil or a fat. The organic material is a polymer, which is semi-synthetic or synthetic. The component (a) is a polyolefin, a poly-ether polyol or a polyurethane. Preferred Definitions:    A = propane-1,2,3-tri-(oxycarbonyl), 2-methyl-propane-1,2,3-tri-(oxycarbonyl), 2-methyl-butane-1,2,1'-tri-(oxycarbonyl), 2,2-dimethyl-butane-1,1',1"-tri-(oxycarbonyl), 2,2-dimethyl-pentane-1,1',1"-tri-(oxycarbonyl) or 3-ethyl-3-azapentane-1,5,2'-tri-(oxycarbonyl) (when n is 3) or 2,2-dimethyl-propane-1,3,1',1"-tetra-(oxycarbonyl) (when n is 4); and    R1, R2, R4-R7, R9, R10 = H.    SPECIFIC COMPOUNDS - The use of 25 compounds (I) is disclosed e.g. 2-oxo-4,5-diphenyl-2,5-dihydro-furan-3-carboxylic acid methyl ester of formula (Ia), 4,5-bis-(4-methoxy-phenyl)-2-oxo-2,5-dihydro-furan-3-carboxylic acid methyl ester, 2-oxo-4,5-diphenyl-2,5-dihydro-furan-3-carboxylic acid amide, 2-oxo-4,5-diphenyl-2,5-dihydro-furan-3-carboxylic acid octylamide, and 2-oxo-4,5-diphenyl-2,5-dihydro-furan-3-carboxylic acid cyclohexylamide.    EXAMPLE - Typical composition comprised (in parts): Lupranol 2084 (RTM: Trifunctional polyether polyol) (100); and stabilizer composition (comprising Irganox 1135 (RTM: Phenolic antioxidant containing 3-(3,5-di-tert-butyl-4-hydroxy-phenyl)-propionic acid iso-octyl ester) (0.32), Irganox 5057 (RTM: Aminic antioxidant comprising reaction product of diphenylamine and diisobutylene) (0.10), and 2-oxo-4,5-diphenyl-2,5-dihydro-furan-3-carboxylic acid methyl ester (0.03)) (0.45).