The illustration depicts the molecular structure of uracil, a pyrimidine nucleobase found in RNA. The diagram displays a complex array of atoms represented by blue, gray, and white circles connected with lines to indicate chemical bonds. The molecule contains elements such as hydrogen, carbon, oxygen, and nitrogen. Uracil plays a critical role in the synthesis and functionality of RNA, serving as one of the key nucleobases along with adenine, guanine, and cytosine.