ASSIGNMENT OF THE ABSOLUTE-CONFIGURATION TO WINTERSTEIN ACID, R-3-DIMETHYLAMINO-3-PHENYL PROPIONIC-ACID, BY THE ASYMMETRIC-SYNTHESIS OF HOMOCHIRAL (S)-(+)-ETHYL 3-DIMETHYLAMINO-3-PHENYL PROPIONATE - Davies, S; Dupont, J; Easton, R (1990)