How does InChI deal with structures that are composed of multiple interconnected (covalently bonded) components?
Many substances are best represented as multiple, independent structures. InChI will represent such substances by simply appending the individual layers for each component in each layer and sorting these components using a set of fixed rules (these are represented as conventional ‘dot-disconnected’ units in the formula layer, or with semicolons in other layers). InChI creation assumes that if multiple structures are present in a single input connection table, they are components of a single compound. In most cases, it is possible to extract the InChI of each component from a composite InChI by excising the corresponding part of each layer. The order of the components in the layers is strictly defined.
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