[1]Cohen;Minsk[JournaloftheAmericanChemicalSociety,1957,vol.79,p.1759,1762]
[1]Cohen;Minsk[JournaloftheAmericanChemicalSociety,1957,vol.79,p.1759,1762]
[1]Cohen;Minsk[JournaloftheAmericanChemicalSociety,1957,vol.79,p.1759,1762]
[1]CurrentPatentAssignee:C.H.BoehringerSohnAG&Co.KG-US4931436,1990,A