pharmaceutical for neuriatria caused by unbalanced nervous system or abnormal exasperation of muscular pulse further the alkylenediamine derivative is of value as agricultural chemical particularly as insecticide because it is effective to block the transmission at neuromuscular junctions of insects in which glutamic acid serves as excitatory transmitter at their neuromuscular junctions whereby decreasing actions of insects it has been further confirmed that the alkylene diamine derivative of the invention is low both in acute toxicity and subacute toxicity in the aforementioned formulae i and ii the aliphatic hydrocarbon group may be either saturated or unsaturated hydrocarbon group however saturated hydrocarbon group is preferred each of r 1 and r 6 preferably is a straight or branched chain alkyl group having 3 8 carbon atoms such as propoyl isopropyl butyl isobutyl pentyl isopentyl hexyl heptyl octyl or 2 ethylhexyl or phenyl each of r 2 and r 7 preferably is a straight or branched chain alkyl group having 4 8 carbon atoms such as butyl isobutyl pentyl isopentyl hexyl heptyl octyl or 2 ethylhexyl otherwise r 2 preferably is a straight or branched chain alkoxy group having 4 8 carbon atoms such as butoxy isobutoxy pentyloxy isopentyloxy hexyloxy heptyloxy octyloxy or 2 ethylhexyloxy further each of r 2 and r 7 preferably is a straight or branched chain aliphatic hydrocarbon group containing an ester bonding and 4 8 carbon atoms such as butyryloxypropyl isobutyryloxyethyl valeryloxyethyl isovaleryloxyethyl caproyloxyethyl or isocaproyloxyethyl furthermore each of r 2 and r 7 preferably is an aliphatic hydrocarbon group containing an ether bonding and 4 8 carbon atoms such as isoproboxyethyl isobutyloxy ether isoproboxypropyl pentyloxypropyl or ixopentyloxyether or phenyl.