Assertion: alkyl pyridine | /r/HasProperty | scriven et al
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Source sentences:
text: Coal tar, containing roughly 0.01% by weight alkyl pyridines (Scriven et al. 1996), became insufficient to satisfy commercial demand for alkyl pyridines and, by 1988, less than 5% of alkyl pyridines were produced globally through natural production (Scriven et al. 1996).