Schoepf et al. Chemische Berichte, 1953 , vol. 86, p. 918,924 Chemische Berichte, 1960 , vol. 93, p. 2457,2463 Full Text Show Details Schoepf et al. Chemische Berichte, 1960 , vol. 93, p. 2457,2462, 2464