Ohle Chemische Berichte, 1938 , vol. 71, p. 562,567 Full Text Show Details Reichstein; Gruessner Helvetica Chimica Acta, 1934 , vol. 17, p. 311,319 Full Text Show Details Beresowskii et al. Trudy vitamin. Inst.Chem.Abstr., 1954 , vol. 5, p. 21,23 Trudy vitamin. Inst.Chem.Abstr., 1957 , p. 7307