About WANNING M
About Univ. Tuebingen, FRG
About ZAEHNER H
About Univ. Tuebingen, FRG
About KRONE B
About Univ. Goettingen, FRG
About ZEECK A
About Univ. Goettingen, FRG
About Tetrahedron Letters
About antibiotics
About クラバン
About Other natural substances of biological origin
About Microorganism biochemistry
About バン
About ラクタム抗生物質