Heroin

D.3.3 Compare the structures of morphine, codeine and diamorphine (heroin) IB Chemistry SL
The molecules are very similar — you need to know that they all contain a tertiary amine. But there are subtle differences which you need to be able to identify (you will be allowed to use the data booklet which has the structures). Morphine can be turned to heroin by warming with ethanoic acid and using a sulphuric acid catalyst. Don’t do this.