(a)[1]
Suggest the reagents together with the conditions for reaction 3.
(b)[1]
What type of reaction does reaction 4 show?
(c)[1]
Suggest suitable reagents and conditions for reaction 5.
(d)[1]
Name the functional group in $C$ that reacts with hot concentrated acidified $\text{KMnO}_4$.
(e)[1]
Suggest which functional group in capsaicin reacted in reaction 1.
(f)[5]
Deduce the structures of compounds $C$-$F$ and capsaicin, then draw their structural formulae in the boxes opposite.