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Branches are described with parentheses, as in CCC (= O ) O for propionic acid and C ( F )( F ) F for fluoroform.
Substituted rings can be written with the branching point in the ring as illustrated by the SMILES COc ( c1 ) cccc1C # N ( see depiction ) and COc ( cc1 ) ccc1C # N ( see depiction ) which encode the 3 and 4-cyanoanisole isomers.
Writing SMILES for substituted rings in this way can make them more human-readable.

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