Richard J.Wurtman, Mehmet Cansev, Toshimasa Sakamoto, and Ismail H. Ulus
Annual Review of Nutrition, 29, 59-87
It is conventional practice in reading and drawing chemical structures, to assume that Carbon is located at the end of any line or any kink where the element is not explicitly noted. Furthermore, Carbon always seeks to form 4 chemical bonds. When you don't see 4 lines coming from any given Carbon, assume those bonds are filled by Hydrogen atoms.