Ten new abnormalErythrinaalkaloids, isococculidine, isococculine, coccuvine, coccuvinine, cocculitine, cocculitinine, coccudinone, cocculimine, coccudienone, coccoline and coccolinine have been isolated from the leaves of Cocculus laurifolius D.C. and their structures and stereochemistry is assigned by chemical transformations and spectral studies. The known proaporphine alkaloid stepharine and the