Larger and more complex organic compounds are known as

Larger and more complex organic compounds are known as Polymers.
Complex organic molecules refer to polymer-like molecules such as proteins. Proteins are typical complex organic polymers with well-defined three-dimensional shapes, composed of 20 kinds of amino acids.
A polymer is any of a class of natural or synthetic substances composed of very large molecules, called macromolecules, which are multiples of simpler chemical units called monomers.