Identification of the Bacterial Maytansinoid Gene Cluster asc Provides Insights into the Post-PKS Modifications of Ansacarbamitocin Biosynthesis

Identification of the Bacterial Maytansinoid Gene Cluster <i>asc</i> Provides Insights into the Post-PKS Modifications of Ansacarbamitocin Biosynthesis The Ansacarbamitocins: Polar Ansamitocin Derivatives The Ansacarbamitocins: Polar Ansamitocin Derivatives First Ring‐Expanded Maytansin Lactone Accessed by a New Mutasynthetic Variant A Novel Amide N-Glycoside of Ansamitocins from Actinosynnema pretiosum Pentaketide Ansamycin Microansamycins A–I from <i>Micromonospora</i> sp. Reveal Diverse Post-PKS Modifications Two novel ansamitocin analogs from <i>Actinosynnema pretiosum</i> Ansamitocin, a group of novel maytansinoid antibiotics with antitumour properties from Nocardia Targeted Discovery of Pentaketide Ansamycin Aminoansamycins A–G Targeted Discovery of Pentaketide Ansamycin Aminoansamycins A–G