An alkanethioic acid derivative capable of imparting a characteristic aroma or flavor to fragrances and cosmetics, and foods and beverages; and a perfume composition comprising the alkanethioic acid derivative as an active ingredient. S-alkyl 5-[(1-alkoxy)ethoxy]alkanethioate represented by formula (1), and a perfume composition comprising the S-alkyl 5-[(1-alkoxy)ethoxy]alkanethioate represented by formula (1) as an active ingredient. In the formula (1), R.sub.1 represents an alkyl group having 1 to 9 carbon atoms, R.sub.2 represents an alkyl group having 2 to 4 carbon atoms, and R.sub.3 represents a methyl group or an ethyl group.

The objective of the present invention is to provide a hydrophilic metal surface treatment agent by which a water-repellent property can be given to a metal surface with suppressing a corrosion and a discolorment of the metal, a method for treating a surface of a metal by using the hydrophilic metal surface treatment agent, a synthetic intermediate compound of a branched glycerol derivative as an active ingredient of the hydrophilic metal surface treatment agent, and a method for efficiently producing the synthetic intermediate compound. The hydrophilic metal surface treatment agent of the present invention is characterized in comprising the branched glycerol derivative represented by the following formula (I) as an active ingredient. ##STR00001##
wherein R.sup.1 is a hydrocarbon group having a carbon number of 10 or more and 30 or less, X is S or a carbonyl group, Y is an n+1 valent linker group, n is an integer of 1 or more and 5 or less.

The objective of the present invention is to provide a hydrophilic metal surface treatment agent by which a water-repellent property can be given to a metal surface with suppressing a corrosion and a discolorment of the metal, a method for treating a surface of a metal by using the hydrophilic metal surface treatment agent, a synthetic intermediate compound of a branched glycerol derivative as an active ingredient of the hydrophilic metal surface treatment agent, and a method for efficiently producing the synthetic intermediate compound. The hydrophilic metal surface treatment agent of the present invention is characterized in comprising the branched glycerol derivative represented by the following formula (I) as an active ingredient. ##STR00001##
wherein R.sup.1 is a hydrocarbon group having a carbon number of 10 or more and 30 or less, X is S or a carbonyl group, Y is an n+1 valent linker group, n is an integer of 1 or more and 5 or less.

A method is provided to conveniently separate racemic (3R,4S)-3-acetamido-4-allyl-N-(tert-butyl)pyrrolidine-3-carboxamide and (3S,4R)-3-acetamido-4-allyl-N-(tert-butyl)pyrrolidine-3-carboxamide using selective crystallization with chiral carboxylic acids.

A method is provided to conveniently separate racemic (3R,4S)-3-acetamido-4-allyl-N-(tert-butyl)pyrrolidine-3-carboxamide and (3S,4R)-3-acetamido-4-allyl-N-(tert-butyl)pyrrolidine-3-carboxamide using selective crystallization with chiral carboxylic acids.

The present disclosure provides compounds of the formula (I), (II), (III), wherein the variables are as defined herein for use in the treatment of fungal infections. In some embodiments, the fungal infection is an infection of Cryptococcus neojormans fungus. Also provided herein are compositions comprising a compound of formula I, II, or III and a second anti-fungal agent. ##STR00001##

The present disclosure provides compounds of the formula (I), (II), (III), wherein the variables are as defined herein for use in the treatment of fungal infections. In some embodiments, the fungal infection is an infection of Cryptococcus neojormans fungus. Also provided herein are compositions comprising a compound of formula I, II, or III and a second anti-fungal agent. ##STR00001##

A compound is shown in formula I and can be in the form of a pharmaceutically acceptable salt, or a stereoisomer, or a solvate, or a prodrug, or a metabolite. The compound takes effect rapidly and has a long-time local anesthetic effect following a single dose, with the sensory nerve blocking time being greater than the motor nerve blocking time, has both a long-acting local anesthetic effect and a selective local anesthetic effect, significantly reduces side effects of the compositions QX314 and QX314 and a quaternary ammonium salt compound with surfactant structural characteristics, and is safer. The compound of formula I of the present invention and a pharmaceutically acceptable salt thereof can be used for preparing drugs that have a long-time local anesthetic effect and a selective local anesthetic effect.

A method is provided to conveniently separate racemic (3R,4S)-3-acetamido-4-allyl-N-(tert-butyl)pyrrolidine-3-carboxamide and (3S,4R)-3-acetamido-4-allyl-N-(tert-butyl)pyrrolidine-3-carboxamide using selective crystallization with chiral carboxylic acids.

A method is provided to conveniently separate racemic (3R,4S)-3-acetamido-4-allyl-N-(tert-butyl)pyrrolidine-3-carboxamide and (3S,4R)-3-acetamido-4-allyl-N-(tert-butyl)pyrrolidine-3-carboxamide using selective crystallization with chiral carboxylic acids.