amines->{CN(C),{C,c}N(H)}
thiols->{{C,c}S}
alcohols->{cO}
sulfonamides->{{C,c}S(=O)(=O)N(H)}
nSynthons->{$amines$,$thiols$,$alcohols$,$sulfonamides$}
lGroups->{Cl,Br,I}
eSynthons->{C(=O){C,c}}

reactants->{ $nSynthons$(H).}**{$lGroups$**$eSynthons$ }
products->{ $nSynthons$**{$eSynthons$%$lGroups$} }

$reactants$>>$products$