5. Explain the following for the natural product compound (5 + 5 + 10 + 10] The fundamental difference between primary and secondary metabolites The general structure of flavonoids and the basis for their classification List each example of a terpenoid and show the isorene rule for: monoterpenoids, sesqueterpenoids and terpenoids. Give one example each for the compound: steroids, true alkaloids, protoalkaloid and pseudoalkaloid