In the reaction sequence $\mathrm{A} \stackrel{\mathrm{O}_{3} / \mathrm{H}_{2} \mathrm{O}}{\longrightarrow}…
In the reaction sequence $\mathrm{A} \stackrel{\mathrm{O}_{3} / \mathrm{H}_{2} \mathrm{O}}{\longrightarrow} \mathrm{B} \stackrel{\Delta}{\longrightarrow} 2 \mathrm{CH}_{3} \mathrm{COOH}+2 \mathrm{CO}_{2}$
the reactant $A$ is
^
