Abstract: Sialic acid derivatives represented by the following general formula: wherein R1 represents a residue of a steroid compound excluding cholestane and cholestene residues, R2 represents hydrogen or methyl group, R3 represents a C1-C6 alkyl group and other, R4 represents hydrogen or acyl group, R5 represents a group of R15O— (R15 represents a C2-C7 acyl group and other), and X represents oxygen or sulfur atom, and their derivatives. These derivatives have activating effect on choline acetyltransferase activity in the chlonergic neurons, and are useful for preventive and therapeutic treatment of dementia, memory disorder, peripheral nervous disorder and so forth.

Abstract: Carboxamide derivatives of the following general formula (I): ##STR1## (wherein R.sup.1 and R.sup.2 are C.sub.1 -C.sub.3 alkyl group or both taken together C.sub.1 -C.sub.3 alkylene group,R.sup.3 is hydrogen atom, dialkylamino group, etc.,R.sup.4 is hydrogen atom, C.sub.1 -C.sub.10 alkyl group,R.sup.5 is C.sub.1 -C.sub.10 alkyl group,m, n, q are an integer from 0-3,p is 0, 1,A ring is ##STR2## B ring is 5 or 6 membered nitrogen containing aromatic ring, are provided, which are useful as medicinals for treating hyperlipemia or atherosclerosis.

Abstract: The present invention provides an indan-1,3-dione derivative represented by the following formula (I): ##STR1## wherein R.sup.1 represents a hydrogen atom or a lower alkyl group; R.sup.2 represents a group represented by ##STR2## wherein E represents a (substituted) phenyl group or a (substituted) pyridyl group; Y represents a hydroxyl group; and Z represents a halogen atom, a (substituted) alkylsulfonyloxy group or a (substituted) phenylsulfonyloxy group, or Y and Z are bonded to represent --O--; and A represents a (substituted) 1,3-butadienylene group or a (substituted) 1,3-azabutadienylene group, and a herbicidal composition containing the same as an active ingredient.

Abstract: The present invention provides indan-1,3-dione derivatives, including derivatives represented by the following formula (I): ##STR1## wherein R.sup.1 represents a hydrogen atom or a lower alkyl group; R.sup.2 represents a group represented by ##STR2## wherein E represents a (substituted) phenyl group or a (substituted) pyridyl group; Y represents a hydroxyl group; and Z represents a halogen atom, a (substituted) alkylsulfonyloxy group or a (substituted) phenylsulfonyloxy group, or Y and Z are bonded to represent --O--; and A represents a (substituted) 1,3-butadienylene group or a (substituted) 1,3-azabutadienylene group, and a herbicidal composition containing the same as an active ingredient.The compound of the formula (I) shows high herbicidal activity against gramineous weeds, cyperaceous weeds, etc. but shows markedly low phytotoxicity against crops.

Abstract: Disclosed herein is a sulfonamide compound represented by the formula (I): ##STR1## wherein A represents a phenyl group which may be substituted, B represents a phenyl group which may be substituted, R represents a lower alkyl group, a lower alkoxy group or a lower haloalkyl group, W represents a hydroxyl group or a halogen atom, and z represents a halogen atom, a lower alkysulfonyloxy group which may be substituted, or a phenylsulfonyloxy group which may be substituted, and a herbicidal composition containing the sulfonamide compound as an effective ingredient.

Abstract: Disclosed herein is an N-[2-(pyridyl)propyl]-N-substituted sulfonamide represented by the following general formula (I): ##STR1## wherein J represents a phenyl group which may be substituted or benzo-condensed, A represents --CH.sub.2 --, --CH.dbd.CH--, --O-- or --N(r)-- (wherein r represents an alkyl group having 1 to 4 carbon atoms), b represents 0 or 1, R represents an alkyl group, alkenyl group, alkynyl group, alkoxy group, fluoroalkyl group or formyl group, D represents a hydroxyl group, E represents a halogen atom, an alkylsulfonyloxy group or a benzenesulfonyloxy group which may be substituted, or D and E represent --O-- in combination, and V represents a pyridyl group which may be substituted, a herbicide containing said N-[2-(pyridyl)propyl]-N-substituted sulfonamide as an active ingredient and a 1-(halogenomethyl)vinylpyridine as an intermediate thereof.

Abstract: .DELTA.'-Tetrahydrophthalimides having a substituted oxy group at 3-position and, if necessary, a halogen atom at 4-position and/or at 2-position of phenyl group as N-substituent have excellent herbicidal activity and are useful as selective herbicides.

Abstract: .DELTA.'-Tetrahydrophthalimides having a substituted oxy group at 3-position and a halogen atom at 4-position if necessary, a halogen atom at 2-position of phenyl group as N-substituent have excellent herbicidal activity and are useful as selective herbicides.

Abstract: N-substituted-3,4,5,6-tetrahydrophthalimides in which the N-substituted group is a phenyl group having a substituted-oxy group at 3-position and a chlorine or bromine atom at 4-position and chlorine or hydrogen atom at 2-position have excellent herbicidal effect and are used as selective herbicides in a plant culturing.

Abstract: Disclosed is a novel 1,2-alkylene-4-substituted urazole derivative which has unique biological activities, especially a herbicidal or weeding activity.