A withanolide; identified as an nNOS inhibitor in an in silico docking study (Ki = 5.15 nM) that also inhibits iNOS and eNOS (Kis = 15.48 and 66.59 nM, respectively); identified as a ligand for the PARP1 catalytic domain in an in silico docking study with an estimated Ki value of 7.54 nM