Solanocastrine (1), a novel 3-amino steroidal alkaloid, isolated from the leaves of Solanum capsicastrum Link has been characterised as 3β -amino-16, 23-cyclo-23β -hydroxy-5∝H, 16ξH, 25βH-22,26-epiminocholestan-17(20),22(N)-diene. © 1987.