Assertion: impurity | /r/HasProperty | reagent
Facets:
Source sentences:
text: Thus if other compounds in this particular alerting class typically elicit a positive effect in TA 98, but the GTI in question elicits a positive effect in TA 1538 and an alkylating agent used as a precursor in the synthesis of the GTI would also likely elicit a positive effect in the same strain (TA 1538), then this strongly suggests that the positive findings may be attributable to an impurity in the test material (e.g. a reagent used in the synthesis of the impurity).