single  molecule    with    the loss    of  a   small   molecule;   a   dehydration reaction,   in  which   a   molecule    of
water   is  lost;   and a   nucleophile–electrophile    reaction,   in  which   a   nucleophile pushes  an  electron
pair    to  form    a   bond    with    an  electrophile.
                    
                      singke
                      (singke)
                      
                    
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