Karrer; Schmid Helvetica Chimica Acta, 1944 , vol. 27, p. 124,126 Full Text Show Details Schoeberl Chemische Berichte, 1947 , vol. 80, p. 381,384 Full Text Show Details Larsson; Joensson Chemische Berichte, 1934 , vol. 67, p. 759