1. (a) Burnell, D. J.; Apsimon, J. W. InMarine Natural Products:Chemicaland Biological Perspectives; Scheuer P. J., Ed.; Academic Press: New York, 1983; Vol. 5, p 88.
2. Steroidal glycosides from starfishes
3. (a) Minale, L.; Riccio, R.; De Simone, F.; Dini, A.; Pizza, C.; Zollo, F. InNatural Products as MedicinalAgents; Beal, J. L., Reinhard, E., Eds.; Hippokrates Verlag, 1981; pp 319−337.