title: Biosynthetic origin of aminobenzenoid nucleus (C7N-unit) of ansamitocin, a group of novel maytansinoid antibiotics.
mesh_terms: D055598:Chemical Phenomena; D002621:Chemistry; D009682:Magnetic Resonance Spectroscopy; D008453:Maytansine / Q000031:analogs & derivatives / Q000096:biosynthesis*; D009615:Nocardia / Q000378:metabolism*; D010078:Oxazines / Q000096:biosynthesis*
chemical_list: D010078:Oxazines; D008453:Maytansine; C015682:ansamitocins