... Please enable JavaScript to use all the features on this page. Tetrahedron: Asymmetry. Volume 1, Issue 9, 1990, Pages 571–574. ... Source of chirality: (S)-(−)ethyl lactate. Reference. 1; NV Bac, Y. Langlois; Preceeding communication Tetrahedron Lett., 29 (1988), p. 2819. ...