Abstract: A fragrance composition containing a compound represented by Formula (1) as an active ingredient: where in Formula (1), R1 represents a linear, branched, or cyclic alkyl group having from 1 to 4 carbon(s); and R2 represents a linear, branched, or cyclic alkyl group having from 1 to 6 carbon(s).

Abstract: A fragrance composition containing a compound represented by Formula (1) as an active ingredient: where in Formula (1), R1 represents a chain hydrocarbon group having from 7 to 20 carbons, and may be linear or branched, and a saturated group or an unsaturated group, and when R1 is an unsaturated group, R1 may have one or more carbon-carbon double bond(s) or carbon-carbon triple bond(s).

Abstract: A method for producing an ?-acyloxycarboxylic acid ester of Formula (1) is described. The method involves reacting an ?-hydroxycarboxylic acid ester compound with an acylating agent in the presence of a catalyst comprising an iron halide compound. R1 represents a hydrogen atom, a methyl group, an ethyl group, an n-propyl group, an isopropyl group, or a tert-butyl group, R2 and R3 each independently represent a methyl group or an ethyl group, and R4 represents a linear, branched, or cyclic alkyl group having from 1 to 6 carbon atoms.

Abstract: A material composition comprising (a) a poly-functional isocyanate, (b) a compound having MW of 600-3,500 and two functional groups polymerizable with an isocyanate group, (c) a compound having MW below 500 and two functional groups polymerizable with an isocyanate group, and (d) a compound having MW below 700 and at least three functional groups polymerizable with an isocyanate group. A shaped polymeric material is made by mixing and heating (a) with part of (b) to give a prepolymer, adding the remainder of (b), (c) and (d) to the prepolymer, and then heating the mixture to effect additional polymerization of (a), (b), (c) and (d). The shaped polymeric material has enhanced tear strength, tensile strength and elongation, reduced permanent set and low toxicity, and suitable for parts for which high stretchability is required.