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[1]JournalofMedicinalChemistry,1993,vol.36,p.2066-2074
[1]JournalofMedicinalChemistry,1993,vol.36,p.2485-2493
[1]JournalofMedicinalChemistry,1990,vol.33,p.950-955
[2]Patent:US5389687,1995,A
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[1]EuropeanJournalofMedicinalChemistry,1993,vol.28,p.693-701