Barber,M.S. et al. Journal of the Chemical Society, 1960 , p. 2870 - 2881 Full Text View citing articles Show Details Karrer; Jucker Helvetica Chimica Acta, 1945 , vol. 28, p. 427,435 Full Text Show Details Tsukida; Zechmeister Archives of Biochemistry, 1958 , vol. 74, p. 408,424