Assertion: impurity | /r/HasProperty | ammonia
Facets:
Source sentences:
text: In relation to α,α′-dimethyldiphenethylamine, we propose that the formation of this species arises as a result of further specific impurities contained within the supplied N-methylformamide; these impurities are ammonia and formamide, and these species allow two possible routes into the second byproduct to be envisaged.