Alkaloids belonging the carbonated skeletal types: Lycorine, Narciclasine, Crinine, Haemanthamine, Tazetine and Galanthamine were isolated from: Eucharis amazonica, E. grandiflora, Caliphruria subedentata and Crinum kunthianum, Colombian species of Amaryllidaceae. Several species are probably extinct. This compounds have shown different activities.