title: Structures of olivanic acid derivatives MM 22380, MM 22381, MM 22382 and MM 22383; four new antibiotics isolated from Streptomyces olivaceus.
mesh_terms: D000478:Alkylation; D000900:Anti-Bacterial Agents / Q000096:biosynthesis / Q000302:isolation & purification; D055598:Chemical Phenomena; D002621:Chemistry; D007769:Lactams / Q000096:biosynthesis; D008968:Molecular Conformation; D013302:Streptomyces / Q000378:metabolism*; D014961:X-Ray Diffraction
chemical_list: D000900:Anti-Bacterial Agents; D007769:Lactams