... Chem. Soc., 69,200 (1937). A. H. Cook and J. M. Heilbron in ”The Chemistry of Penicillin,” HT Clarke, J. R. W. Keller-Schierlein, M. Lj. ... Page 4. Vol. 5 SHCH, xv11, (a) * = DI. (b) * = I, ... iirisiilistit~iteti acids. \viis :is follows: The mixture to be separat,ed! diss,tlvcd in a siii:iil volume ...