Synthesis by C-photofluorination of d-alanine or by resolution of the dl-form: J. Kollonitsch, F. M. Kahan; J. Kollonitsch, DE 2136067; DE 2229245 C.A. 76, 100053p (1972); 78, 72586d (1973); idem, US 3839170 (1972, 1972, 1974 all to Merck & Co.). The 2-deuterated analog has also been prepared. Antibacterial activity: J. Kollonitsch et al., Nature 243, 346 (1973).