... w. V. DAEHKE, E. FREDERIKSEX, E. GUNDERSEN, F. LUKD, I'. ~ I ~ ~ R c H , ~ HJ PETERSEN, K. ROHOLT, L. TYBRING, AND W. 0. GODTFREDSEN Leo Pharmaceutical Products, 2760 Ballerup, Denmark ... Journal of Medicinal Chemistry, 1970, VoI. IS, So. 611 ...