Cornforth
Chem. Penicillin, <Princeton 1949>, S. 688, 811
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Mozingo; Folkers
Chem. Penicillin, <Princeton 1949>, S. 535, 599
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Brown
Chem. Penicillin, <Princeton 1949>, S. 473, 519

Lab.L.Lafou
Patent: FR2345430DE2804576 , 19771978 ;
Chem.Abstr., 1979 , vol. 90, # 22639