About FREDENHAGEN A
About CIBA-GEIGY, Basel, CHE
About PETER H H
About CIBA-GEIGY, Basel, CHE
About Tetrahedron
About nitrogen heterocyclic compound
About Streptomyces
About Synthesis of antibiotics
About Seven-membered heterocyclic compounds
About Other natural substances of biological origin
About 環縮小
About 立体
About 転位