Chapter 27, Problem 20P

The $5\text{'}$-nucleotide of inosine, inosinic acid ( ${\text{C}}_{\text{10}}{\text{H}}_{\text{13}}{\text{N}}_{\text{4}}{\text{O}}_{\text{8}}\text{P}$), is added to foods as a flavor enhancer. What is the structure of inosinic acid? (The structure of inosine is given in Problem 27.25.)