InChI provides unique labels for well-defined chemical substances.
The IUPAC International Chemical Identifier (InChI) provides unique labels for well-defined chemical substances. These labels are generated by converting an input chemical structure, in the form of a „connection table‟, to a unique and predictable series of ASCII characters. They offer a means for representing chemical compounds in a manner that does not depend on how they were drawn. Note that they are re-expressions of chemical structures, they are not registry or registration numbers and do not require access to a database. They were developed primarily as a means of „naming‟ a compound in digital media although they are expressed as simple text that may be manually interpreted.
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