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ou want to know to which order or to which family a substance belongs? Or which substances belong to one order? Enter a keyword and you will see the postion in the taxonomy. All other items in one group are linked, so you can go forward and backward in the taxonomy.
In case you would rather like to search for self defined groups instead of strictly systematic terms, then please change to the menu item Substance Search. There you can search with the help of several predefined terms as Birds, Tortoises, Ocean, Desert, Ferns etc, without bothering about the exact systematic terminology.