Lyttle and Petering 1,2 synthesized 5-bis-(2-chloroethyl)-aminouracil, uracil mustard, or NSC-34462 or U-8344 (Fig. 2), replacing the methyl group of nitrogen mustard with a physiologically active ...

The chemical structure of uracil, showing its single-ring pyrimidine structure. Uracil forms hydrogen bonds with adenine in RNA, contributing to the molecule's structure and function. (Image: Public ...

Nicholas Hud holds up Uracil, on the right, a nucleobase of RNA. Barbituric acid, on the left, looks very much like it and could have been part of a proto-RNA that preceded RNA. Disclaimer ...

This image illustrates the chemical structures of the five main nucleobases found in DNA and RNA. The pyrimidines, thymine (DNA), uracil (RNA), and cytosine are shown on top while the purines, adenine ...