2D representation of the molecular structure of Nylon 66, show a single repeating unit of the polymer chain, composed of hexamethylene diamine and adipic acid, connected by an amide bond (-CONH-). Use distinct colors or labels for each type of atom: carbon (C) in black, hydrogen (H) in white, nitrogen (N) in blue, and oxygen (O) in red. Ensure the bonds are clearly depicted, and the atoms are positioned correctly to show the typical structure of Nylon 66. High-resolution, white background, dimensions 1024x1024,  --ar 16:9 --s 750