SMILES and SMIRKS Strings

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A SMILES string is a way to describe a chemical structure in a line of text. Several software packages use SMILES strings as a way to enter and store chemical structure information.

A SMIRKS string is a way to describe chemical reactions in text. If you select a reaction and use the Copy As SMILES command, a SMIRKS string is copied to the clipboard. If you use the Paste Special SMILES command when a SMIRKS string is on the clipboard, a reaction is pasted into your document.