This invention relates to an anionic-cationic-nonionic surfactant as substantially represented by the formula (I), production and use thereof in tertiary oil recovery. The anionic-cationic-nonionic surfactant of this invention exhibits significantly improved interfacial activity and stability as compared with the prior art. With the present anionic-cationic-nonionic surfactant, a flooding fluid composition for tertiary oil recovery with improved oil displacement efficiency and oil washing capability as compared with the prior art could be produced. ##STR00001## In the formula (I), each group is as defined in the specification.

Provided are L-glufosinate intermediate preparation method or L-glufosinate preparation method, the method, for preparing L-glufosinate intermediate or L-glufosinate from an L-homoserine derivative, comprising a step of preparing a compound of Chemical Formula 2 from a compound of Chemical Formula 1.

Provided are L-glufosinate intermediate preparation method or L-glufosinate preparation method, the method, for preparing L-glufosinate intermediate or L-glufosinate from an L-homoserine derivative, comprising a step of preparing a compound of Chemical Formula 2 from a compound of Chemical Formula 1.

A novel sphingolipid is disclosed. The novel sphingolipid is in liquid form at room temperature due to a low melting point, and blends easily with a variety of vegetable and/or animal oils. A dermatologic composition for external application containing the novel sphingolipid is also disclosed. The composition is useful in providing anti-inflammatory protection, improving moisturization, protecting the skin from ultraviolet (UV) light, or enhancing skin barriers.

A novel sphingolipid is disclosed. The novel sphingolipid is in liquid form at room temperature due to a low melting point, and blends easily with a variety of vegetable and/or animal oils. A dermatologic composition for external application containing the novel sphingolipid is also disclosed. The composition is useful in providing anti-inflammatory protection, improving moisturization, protecting the skin from ultraviolet (UV) light, or enhancing skin barriers.

The subject matter described herein is directed to compounds, synergistic compositions, and methods for repelling arthropods, such as insects. The compositions comprise aryl and pyridyl-type compounds. The compounds demonstrate strong vapor and topical repellency when applied alone and in synergistic compositions.

Disclosed herein are small molecule calpain modulator compositions, pharmaceutical compositions, the use and preparation thereof.

Disclosed herein are small molecule calpain modulator compositions, pharmaceutical compositions, the use and preparation thereof.

Disclosed are a mild and efficient preparation method for an α-acyloxyenamide compound and a use thereof in the synthesis of an amide and a polypeptide. The α-acyloxyenamide compound is obtained by an addition reaction of a ynamide and a carboxylic acid in dichloromethane under conditions where the temperature is 0° C. to 50° C.; the produced α-acyloxyenamide compound can react with an amine compound to produce an amide or a polypeptide; the two reactions can be carried out step by step, and can also be carried out in one pot. According to the invention, the reaction conditions are mild and no metal catalyst is required; when the carboxylic acid, which has chirality on an alpha site of carboxyl, forms an amide bond or a peptide bond, no racemization occurs; and the operation is simple and the application range is wide.

Disclosed are a mild and efficient preparation method for an α-acyloxyenamide compound and a use thereof in the synthesis of an amide and a polypeptide. The α-acyloxyenamide compound is obtained by an addition reaction of a ynamide and a carboxylic acid in dichloromethane under conditions where the temperature is 0° C. to 50° C.; the produced α-acyloxyenamide compound can react with an amine compound to produce an amide or a polypeptide; the two reactions can be carried out step by step, and can also be carried out in one pot. According to the invention, the reaction conditions are mild and no metal catalyst is required; when the carboxylic acid, which has chirality on an alpha site of carboxyl, forms an amide bond or a peptide bond, no racemization occurs; and the operation is simple and the application range is wide.