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[1]TetrahedronLetters,2002,vol.43,p.8149-8151
[1]JournalofOrganicChemistry,1999,vol.64,p.6804-6814
[1]JournalofOrganicChemistry,1999,vol.64,p.6804-6814
[1]JournaloftheChemicalSociety.PerkintransactionsI,1993,p.1673-1676