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10:42, 10 July 2009 =Markush Structure=
Markush structures is a generic structure which can represent lot of specific structures. The generic structures are prepared with lot of variations like:
* R-groups (substituent variation)
* Atom, bond lists
* Repeating units (link nodes and groups)
* Position variation (variable point of attachment)
* Homology variation (e.g. alkyl, aryl)
* Conditions for generic features: occurrence lists, dependency, etc
=Demonstration of a markush structure=