potential target for the discovery of chemosensitizers and anticancer drugs. Amentoflavone (AMF) is reported to be a selective PARP-1 inhibitor. Here, structural modifications and trimming of AMF have led to a series of AMF derivatives (9a–h) and apigenin–piperazine/piperidine hybrids (14a–p, 15a–p, 17a–h, and 19a–f), respectively. Among these compounds, 15l exhibited a potent PARP-1 inhibitory effect