[1]TetrahedronLetters,1987,vol.28,p.4255-4258
[1]JournaloftheChemicalSociety.PerkintransactionsI,1985,p.1645-1660
[1]JournaloftheChemicalSociety.PerkintransactionsI,1985,p.1645-1660
[1]TetrahedronLetters,1987,vol.28,p.4255-4258
[1]JournalofOrganicChemistry,1984,vol.49,p.1208-1211