Keywords: Niraparib.jpg disputed_chem Two nitrogens lack their hydrogens Stereochemistry is invalid Please compare with superseding image below and http //www chemspider com/Chemical-Structure 24531930 html ChemSpider page Niraparib svg en Niraparib MK-4827 chemical structure 2016-08-02 ChemIDplus U S National Library of Medicine other versions PD-USGov Niraparib |