Assertion: alkaloid's activity | /r/HasProperty | determined for stichoneurine f
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Source sentences:
text: Moreover, a modest activity at 71.5 µmol was determined for stichoneurine F (40), while the closely related stichoneurine G (41) was not active at 100 µmol, indicating an adverse effect by the additional C-9 hydroxy group (Ramli et al. 2014).