The invention relates to indane compounds of formula (I): to their preparation and to their therapeutic use.

##STR00001##

The invention relates to indane compounds of formula (I): to their preparation and to their therapeutic use.

##STR00001##

Phytol contained in watermelon sprouts is known to have a cancer cell growth inhibiting effect. However, there is a problem that an amount of phytol to be taken for exhibiting cancer cell growth inhabition is large.

A cancer cell growth inhibiting composition comprising at least one of compounds having a structure represented by Formula (1), Formula (2), Formula (6), Formula (7) or Formula (8), or a pharmaceutically acceptable salt thereof as main components has a higher cancer cell growth inhibiting effect than phytol.

##STR00001##

Phytol contained in watermelon sprouts is known to have a cancer cell growth inhibiting effect. However, there is a problem that an amount of phytol to be taken for exhibiting cancer cell growth inhabition is large.

A cancer cell growth inhibiting composition comprising at least one of compounds having a structure represented by Formula (1), Formula (2), Formula (6), Formula (7) or Formula (8), or a pharmaceutically acceptable salt thereof as main components has a higher cancer cell growth inhibiting effect than phytol.

##STR00001##

The present disclosure provides an acrylamide production system. The acrylamide production system includes a storage device, a reaction kettle, a filter device, an impurity removal device, and a collection device. The storage device is used for storing microbes required for a reaction. A discharge end of the storage device is connected to a feed end of the reaction kettle through a pipeline. A discharge end of the reaction kettle is connected to a feed end of the filter device through a pipeline. A filtrate discharge end of the filter device is connected to a feed end of the impurity removal device through a pipeline. A discharge end of the impurity removal device is connected to the collection device through a pipeline. According to the acrylamide production system of the present disclosure, the whole process for producing an acrylamide aqueous solution is simple, which facilitates producing a high-purity acrylamide solution.

The present disclosure provides an acrylamide production system. The acrylamide production system includes a storage device, a reaction kettle, a filter device, an impurity removal device, and a collection device. The storage device is used for storing microbes required for a reaction. A discharge end of the storage device is connected to a feed end of the reaction kettle through a pipeline. A discharge end of the reaction kettle is connected to a feed end of the filter device through a pipeline. A filtrate discharge end of the filter device is connected to a feed end of the impurity removal device through a pipeline. A discharge end of the impurity removal device is connected to the collection device through a pipeline. According to the acrylamide production system of the present disclosure, the whole process for producing an acrylamide aqueous solution is simple, which facilitates producing a high-purity acrylamide solution.

There is provided an α-carbonyl alkenyl ester and a preparation method therefor, and the α-carbonyl alkenyl ester is further used to react with a primary or secondary amine to prepare an amide. The two reactions are combined to develop an amide bond and peptide bond formation method that directly use carboxylic acids and amines as starting materials and allenones as a condensing reagent. The α-carbonyl alkenyl ester corresponding to an α-amino acid serves as a peptide synthesis building block and is used in solid phase peptide synthesis. The method is carried out under mild reaction conditions, simple to operate, and has a high yield. Compared with existing amide bond condensation reagents, the allenones have the advantages of being simple to prepare, having good stability, a low molecular weight, not racemizing when activating α-chiral carboxylic acids, and is a novel amide bond and peptide bond condensing reagent.

There is provided an α-carbonyl alkenyl ester and a preparation method therefor, and the α-carbonyl alkenyl ester is further used to react with a primary or secondary amine to prepare an amide. The two reactions are combined to develop an amide bond and peptide bond formation method that directly use carboxylic acids and amines as starting materials and allenones as a condensing reagent. The α-carbonyl alkenyl ester corresponding to an α-amino acid serves as a peptide synthesis building block and is used in solid phase peptide synthesis. The method is carried out under mild reaction conditions, simple to operate, and has a high yield. Compared with existing amide bond condensation reagents, the allenones have the advantages of being simple to prepare, having good stability, a low molecular weight, not racemizing when activating α-chiral carboxylic acids, and is a novel amide bond and peptide bond condensing reagent.

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.

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.