has role independent continuant antineoplastic agent antihypertensive agent phthalazines N-acylpiperazine cyclopropanes EC 2.4.2.30 (NAD(+) ADP-ribosyltransferase) inhibitor apoptosis inducer monofluorobenzenes olaparib CHEBI:83766 A member of the class of <em>N</em>-acylpiperazines obtained by formal condensation of the carboxy group of 2-fluoro-5-[(4-oxo-3,4-dihydrophthalazin-1-yl)methyl]benzoic acid with the free amino group of <em>N</em>-(cyclpropylcarbonyl)piperazine; used to treat advanced ovarian cancer.