Targeted Discovery of Pentaketide Ansamycin Aminoansamycins A–G

Targeted Discovery of Pentaketide Ansamycin Aminoansamycins A–G Targeted Discovery of Pentaketide Ansamycin Aminoansamycins A–G Juanlimycins A and B, Ansamycin Macrodilactams from <i>Streptomyces</i> sp. Juanlimycins A and B, Ansamycin Macrodilactams from <i>Streptomyces</i> sp. Pentaketide Ansamycin Microansamycins A–I from <i>Micromonospora</i> sp. Reveal Diverse Post-PKS Modifications Activating a Cryptic Ansamycin Biosynthetic Gene Cluster To Produce Three New Naphthalenic Octaketide Ansamycins with <i>n</i>-Pentyl and <i>n</i>-Butyl Side Chains Activating a Cryptic Ansamycin Biosynthetic Gene Cluster To Produce Three New Naphthalenic Octaketide Ansamycins with <i>n</i>-Pentyl and <i>n</i>-Butyl Side Chains Ansalactams B–D Illustrate Further Biosynthetic Plasticity within the Ansamycin Pathway 3-Amino-5-hydroxybenzoic Acid in Antibiotic Biosynthesis. XII. Origin of the Oxygen Functionality of the Ansamycin Antibiotic Actamycin. New ansamycin analogues from the mutant strain of Streptomyces seoulensis