1. J. Chem. Soc., Chem. Commun. 1985, 1321;
2. For leading references, see ?Phytoecdysteroids and Zooecdysteroids?, in ?Progress in Ecdysone Research?, Ed. Elsevier, North Holland, Amsterdam, 1980, p. 13.
3. ?The Galbulimima Alkaloids?, in ?The Alkaloids?, Ed. Academic Press, New York-London, 1971, Vol. XIII, p. 260.
4. Insect moulting hormones: Crustecdysone (20-hydroxyecdysone) from Podocarpus elatus