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[1]IndianJournalofChemistry-SectionBOrganicandMedicinalChemistry,1985,vol.24,p.908-909
[1]IndianJournalofChemistry-SectionBOrganicandMedicinalChemistry,1988,vol.27,p.997-1000
[1]BioorganicandMedicinalChemistry,2012,vol.20,p.2789-2795