The present invention relates to novel esters of formula (I) as defined below and their use as fragrance or malodour reducing agents. Moreover, the present invention relates to fragrance compositions comprising a compound or a mixture of compounds of formula (I) and one or more further fragrance substance(s). The invention also provides a method for perfuming a product with a compound or a mixture of compounds of formula (I) as defined below and the perfumed product as well as a method for perfuming hair, skin, textile fibers, surfaces and/or ambient air with a compound or a mixture of compounds of formula (I) as defined below.

A novel odorant of formula (I) wherein each of R.sub.1, R.sub.2, R.sub.3, R.sub.3, R.sub.5, R.sub.6, R.sub.7, R.sub.8, R.sub.9 and R.sub.10 are independently selected from H, CH.sub.3, and C.sub.2H.sub.5; X is selected from —CH.sub.2OH, —CH.sub.2OCOCH.sub.3 and —CHO, n is selected from 0 and 1. The dotted line represents double bond or single bond. ##STR00001##

A novel odorant of formula (I) wherein each of R.sub.1, R.sub.2, R.sub.3, R.sub.3, R.sub.5, R.sub.6, R.sub.7, R.sub.8, R.sub.9 and R.sub.10 are independently selected from H, CH.sub.3, and C.sub.2H.sub.5; X is selected from —CH.sub.2OH, —CH.sub.2OCOCH.sub.3 and —CHO, n is selected from 0 and 1. The dotted line represents double bond or single bond. ##STR00001##

The present disclosure provides compounds and compositions capable of extending lifespan, and methods of use thereof.

The present disclosure provides compounds and compositions capable of extending lifespan, and methods of use thereof.

A method for producing at least one olefin compound selected from the group consisting of a compound of formula (51), a compound of formula (52), a compound of formula (53), and a compound of formula (54), the method including reacting an olefin compound of formula (21) with a olefin compound of formula (31) in the presence of at least one metal catalyst selected from the group consisting of a compound of formula (11), a compound of formula (12), a compound of formula (13), a compound of formula (14), and a compound of formula (15).

##STR00001##

Methods and compositions comprising an emulsion or a microemulsion for use treating an oil and/or gas well are provided. In some embodiments, the emulsion or the microemulsion comprises an aqueous phase, a solvent, a surfactant comprising alkyl polyglycoside, an alcohol, and, optionally, one or more additives.

Methods and compositions comprising an emulsion or a microemulsion for use treating an oil and/or gas well are provided. In some embodiments, the emulsion or the microemulsion comprises an aqueous phase, a solvent, a surfactant comprising alkyl polyglycoside, an alcohol, and, optionally, one or more additives.

The present invention relates to α-asary-laldehyde ester, a preparation method therefor, and an application thereof. The chemical structure of the related α-asary-laldehyde ester is represented by formula I. A related application is an application of the compound in preparation of drugs for calming, mind tranquillizing, senile dementia resisting, convulsion resisting, epilepsy resisting and depression resisting.

The present invention relates to the use of an ether or an ester of a tertiary alkanol or of mixtures of two or more ethers or esters of tertiary alkanols or of a stereoisomer thereof or of a mixture of two or more stereoisomers thereof as aromachemicals; to the use thereof for modifying the scent character of a fragranced composition; to an aroma chemical composition containing an ether or an ester of tertiary alkanol or of mixtures of two or more ethers or esters of tertiary alkanols or of a stereoisomer thereof or of a mixture of two or more stereoisomers thereof; and to a method of preparing a fragranced composition or for modifying the scent character of a fragranced composition. The invention further relates to specific ethers or esters of tertiary alkanols.