text: ;Disconnection: A retrosynthetic step involving the breaking of a bond to form two (or more) synthons.
  ;Retron: A minimal molecular substructure that enables certain transformations.
  ;Retrosynthetic tree: A directed acyclic graph of several (or all) possible retrosyntheses of a single target.
  ;Synthon: A fragment of a compound that assists in the formation of a synthesis, derived from that target molecule. A synthon and the corresponding commercially available synthetic equivalent are shown below:
  ;Target: The desired final compound.
  ;Transform: The reverse of a synthetic reaction; the formation of starting materials from a single product.