Natural Product Biomolecules - Organic Chemistry Concepts: An EFL Approach - page 164

FIGURE 8.22
The nucleic acid sugars.
Figure 8.23 gives the five heterocyclic nitrogen bases which occur in the nucleic
acids. The two purines, adenine and guanine, are found in both DNA and RNA.
Of the three pyrimidines, cytosine occurs in both DNA and RNA. Thymine is
found only in DNA and uracil is only in RNA.
FIGURE 8.23
Nucleic acid heterocyclic bases.
Figure 8.24 gives the structure of typical nucleotides found in either of the
nucleic acids.
FIGURE 8.24
Examples of nucleotides.