A new alkaloid, C15H22ON2, with mp 84-85°C [α]D20 + 77.9° (c 0.56; ethanol) has been isolated from Sophora alopecuroides L. On the basis of UV, IR, PMR, and mass spectral characteristics and the hydrogenation reaction, its most probable structure has been determined as 13,14-dehydrosophoridine. © 1978 Plenum Publishing Corporation.