1. Refers to the first and second polypropylene compounds, in which: (a) the first polypropylene includes: (I) the light chain variable domain of the first specific immunoglobulin (VL1)； (II) the heavy chain variable domain of the second immunoglobulin (VH2), specifically for the second protein target； and (III) a bisagra region, a constant heavy chain region 2 (CH2) and a constant heavy chain region 3 (CH3)；Y (b) the second polyacrylonitrile includes: (1) the light chain variable domain of the second immunoglobulin (VL2) is specifically for the second target protein； (2) the heavy chain variable domain of the first immunoglobulin (VH1) is specifically for the first target protein； Among them: (1) these VL1 and VH1 are connected to form a binding site, which is connected to the first protein target； (2) these VL2 and VH2 are connected to form a binding site, which is connected to the second protein target； (3) this heavy chain constant region 2 (CH2) includes a thyroid gland at position 252, which is a treonin at the position 254 and anhydrides 256,According to Kabat EU index number； and (IV) the first proteome is tnf-alfa, the second proteome is il-23a, the second proteome is il-23a, and the second proteome is Diana tnf-alfa, wherein: (I) VL1 includes SEQ ID No.2, VH1 includes SEQ ID No.1, and this VL2 includes SEQ ID No.8. VH2 includes SEQ ID No.7； or (II) VL1 includes SEQ ID No.4 or 6； VH1 includes SEQ ID No.3 or 5； VL2 includes SEQ ID No.8； VH2 includes SEQ ID No.7； or (III) VL1 includes SEQ ID No.8； VH1 includes SEQ ID No.7； VL2 includes SEQ ID No.2,VH2 includes SEQ ID No.1； or (IV) VL1 includes SEQ ID No.8； VH1 includes SEQ ID No.7； VL2 includes SEQ ID No.4 or 6； VH2 includes SEQ ID No.3 or 5Se refiere a un compuesto que comprende un primer y segundo polipeptido, en el que: (A) dicho primer polipeptido comprende: (i) un dominio variable de cadena ligera de una primera inmunoglobulina (VL1) especifico para una primera proteina diana； (ii) un dominio variable de
