title: Chemical modification of ansamitocins. II. Synthesis of 3-epimaytansionoids via 3-maytansinones.
mesh_terms: D000818:Animals; D000903:Antibiotics, Antineoplastic / Q000138:chemical synthesis*; D005057:Eukaryotic Cells / Q000187:drug effects; D008453:Maytansine / Q000031:analogs & derivatives / Q000138:chemical synthesis* / Q000494:pharmacology; D009615:Nocardia / Q000378:metabolism; D010078:Oxazines / Q000138:chemical synthesis*; D014176:Protein Biosynthesis; D013769:Tetrahymena pyriformis / Q000378:metabolism
chemical_list: D000903:Antibiotics, Antineoplastic; D010078:Oxazines; D008453:Maytansine; C015682:ansamitocins