The skeletal formula of an organic compound is a shorthand representation of its molecular structure. Skeletal formulae are ubiquitous in organic chemistry as they represent complicated structures clearly and they are quick and simple to draw. For these reasons the majority of molecular structures on Chemipedia are skeletal ones. When adding a new image of a chemical, the first image of it that should be uploaded should be a skeletal structure (or its structural formula if the chemical is a very simple one such as methane) - see the Chemipedia style guide for more information on uploading images.