Two isoquinolines and one quinolone were isolated from the stem bark of Pellodendron amurense Rupr. (Rutaceae). Two isoquinolines were elucidated as thalifoline (2) and pharmacological active berberine (3) has been blocking the release of $Ca^{2+}$ from internal stores. One quinolone was identified as N-methylatanine (1). This is the first report on the isolation of N-methylatanine (1) and thalifoline (2) from this plant.