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[2]CurrentPatentAssignee:PFIZERINC-US5281612,1994,A
[3]CurrentPatentAssignee:PFIZERINC-US4638067,1987,A
[4]CurrentPatentAssignee:PFIZERINC-US4771054,1988,A
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[1]JournalofHeterocyclicChemistry,1987,vol.24,p.215-217
[1]CurrentPatentAssignee:PFIZERINC-US4638067,1987,A
[2]CurrentPatentAssignee:PFIZERINC-US4771054,1988,A