Abstract: The present invention provides a polysubstituted nitrogen-containing heterocyclic derivative, a preparation method, and use thereof. In the present invention, the novel structure of the natural nitrogen-containing heterocyclic molecule is designed to obtain the polysubstituted nitrogen-containing heterocyclic derivative. The polysubstituted nitrogen-containing heterocyclic derivatives have obvious bactericidal activity, and some compounds have significant bactericidal activity against diseases such as E. carotovora, E. coli, and R. solanacearum, which can be widely applied in the comprehensive prevention and control of agricultural and forestry bacterial diseases. The bactericide obtained by mixing the polysubstituted nitrogen-containing heterocyclic derivative of the present invention with various adjuvants also have good bactericidal effects on E. coli, E. carotovora, R. solanacearum, etc.

Abstract: A shoe body fixing structure, including: a sole, the sole is fixedly connected with a connecting assembly, and the connecting assembly is fixedly connected with an upper. The connecting assembly includes a sewing thread, a latch and a latch pocket. The upper and the sole are connected by using the sewing thread, one end of the sewing thread is attached to a prefabricated latch, and the latch is placed in the latch pocket fixed to the sole. The latch pocket is opened, the latch is taken out and pulled to pull out the entire sewing thread connected to it, so that the upper and the sole can be unfixed, completely separated, and enter a corresponding recycling process respectively. Thus it has advantages of convenient disassembly and convenient recycling.