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Jolliffe KA, Bell TDM, Ghiggino KP, Langford SJ, Paddon-Row MN.Jolliffe KA, et al.Angew Chem Int Ed Engl. 1998 Apr 20;37(7):915-919. doi: 10.1002/(SICI)1521-3773(19980420)37:7<915::AID-ANIE915>3.0.CO;2-8.Angew Chem Int Ed Engl. 1998.PMID: 29711493