A novel cholestane diglycoside, named candicanoside A (1), was isolated fro
m the bulbs of Galtonia candicans by monitoring the cytotoxic activity on H
L-60 leukemia cells. Candicanoside A (1) is very unique in structure, havin
g two epoxy functionalities in its rearranged cholestane skeleton, and show
ed differential cytotoxicity in the Japanese Foundation for Cancer Research
38 cell-line assay.