User guide

The figure below shows an alternative group definition and a parent structure with the attachment rank indicators hid-
den.
Figure 11.14: Hidden attachment indicators
R-group reaction queries
You can search and store reactions. In a reaction, one or several compounds (reactants) are transformed into other
compounds (products). Individual reactants (or products) are separated from each other with plus signs. The react-
ants are separated from the products with an arrow.
You can also search for chemical reactions containing r-groups. An example of a chemical reaction containing r-
groups is shown below:
Searching for reactants
Searching for reactants is useful if you have a known starting material and you are interested in learning more about
what substances it can produce. A reactants query is very similar to a reaction search, except that there is nothing to
the right of the arrow. For example, consider the query:
ChemBioDraw 13.0
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