URL:http://www.chemguide.co.uk/basicorg/conventions/butan2ol3d.GIF
掲載元:https://chem.libretexts.org/Courses/Purdue/Purdue_Chem_26100:_Organic_Chemistry_I_(Wenthold)/Chapter_02._Structures_and_Properties_of_Organic_Molecules/2.2_Molecular_Shapes_and_Hybridization/2.2.2._Drawing_3-Dimensional_Molecules