Aso Nippon Nogei Kagaku Kaishi, 1939 , vol. 15, p. 161,166, 168 Chem.Abstr., 1940 , p. 379 Full Text Show Details Reichstein; Oppenauer Helvetica Chimica Acta, 1933 , vol. 16, p. 988,997 Helvetica Chimica Acta, 1934 , vol. 17, p. 390,392