The present invention relates to compounds of Formula (I), wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4x, R.sup.4y, m, n and G are as defined herein. The invention further relates to herbicidal compositions which comprise a compound of Formula (I), to their use for controlling weeds, in particular in crops of useful plants. ##STR00001##

The present invention relates to compounds of Formula (I), wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4x, R.sup.4y, m, n and G are as defined herein. The invention further relates to herbicidal compositions which comprise a compound of Formula (I), to their use for controlling weeds, in particular in crops of useful plants. ##STR00001##

A new aminoketone compound, and a preparation method therefor and the use thereof are provided. Specifically, the compound has a structure as shown in formula (I), wherein the definition of each group and substituent are as described in the description. A preparation method for the compound is provided. The compound can be used to treat depression.

##STR00001##

A new aminoketone compound, and a preparation method therefor and the use thereof are provided. Specifically, the compound has a structure as shown in formula (I), wherein the definition of each group and substituent are as described in the description. A preparation method for the compound is provided. The compound can be used to treat depression.

##STR00001##

The present invention relates to an aromatic compound and a preparation method therefor and the use thereof. Specifically, disclosed are a compound as shown in the following general formula (I), or a tautomer, an enantiomer, a diastereomer or a racemate thereof or a mixture thereof, or a pharmaceutically acceptable salt thereof. Also disclosed are a method for preparing the above compound and the use of same in the treatment of nervous system diseases.

The invention relates to a process for the preparation of colchicine 1 from colchicoside 2 which comprises enzymatic conversion of colchicoside 2 to 3-O-demethylcolchicine 3, wherein the enzyme used is a cellulase. According to another aspect of the invention, 3-O-demethylcolchicine 3 can be converted to colchicine 1 using an alkylating agent. The invention also relates to a process for enriching the colchicine 1 content of extracts from plants belonging to the Colchicaceae family containing colchicine 1, colchicoside 2 and 3-O-demethylcolchicine 3, which comprises conversion by means of a colchicoside 2 cellulase to 3-O-demethylcolchicine 3, followed by conversion of 3-O-demethylcolchicine 3 to colchicine 1 using an alkylating agent.

The invention relates to a process for the preparation of colchicine 1 from colchicoside 2 which comprises enzymatic conversion of colchicoside 2 to 3-O-demethylcolchicine 3, wherein the enzyme used is a cellulase. According to another aspect of the invention, 3-O-demethylcolchicine 3 can be converted to colchicine 1 using an alkylating agent. The invention also relates to a process for enriching the colchicine 1 content of extracts from plants belonging to the Colchicaceae family containing colchicine 1, colchicoside 2 and 3-O-demethylcolchicine 3, which comprises conversion by means of a colchicoside 2 cellulase to 3-O-demethylcolchicine 3, followed by conversion of 3-O-demethylcolchicine 3 to colchicine 1 using an alkylating agent.

Compounds of the formula (I), in which the substituents are as defined in claim 1, are suitable for use as nematicides. ##STR00001##

Compounds of the formula (I), in which the substituents are as defined in claim 1, are suitable for use as nematicides. ##STR00001##