The FDA Substance Registration System (SRS) registers and assigns UNique Ingredient Identifiers (UNII) to substances which may be simple chemicals or complex substances such as chemically modified biopolymers or synthetic polymers. These complex substances cannot be identified by a single InChI string however InChI strings may be used for identification of the structural elements these complex substances are comprised of. These structural elements include monomers, modifying agents and fragments. We will discuss the possibility of using InChI strings as building blocks for creating the more complex identifiers needed for registration of these complex substances.

InChIs as building blocks for complex substance identifiers

243rd National Meeting (2012)

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