Assertion: polymer | /r/HasProperty | based on their monomeric structure
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Source sentences:
text: Even International Union of Pure and Applied Chemistry (IUPAC) naming conventions and Chemical Abstracts Service Registry Numbers, or simply, CAS numbers, both of which identify polymers based on their monomeric structure, have shortcomings; this helps explain why PolyInfo,(30) the largest online polymers database, created its own numbering system.