Assertion: impurity | /r/SimilarTo | the target substance
Facets:
value: structurally
type: MANNER
value: very
type: DEGREE
value: on one hand
type: MANNER
Source sentences:
text: The impurities generated by degradation of the target substance are, on one hand, structurally very similar to the target substance and therefore it is very difficult to reduce their content in the API by common methods (e.g. crystallization).