CH1012
                                         L1 /   
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                                         L1 /   
12
BIOLOGICAL RELEVANCE
Methylation of a neurotransmitter hormone
SAM (S-adenosylmethionine) has a good leaving group (a sulphonium ion).
Adrenaline
      (adrenal gland)
Noradrenaline
SAM
A typical SN2 reaction !