New Tetramic Acids Comprising of Decalin and Pyridones From Chaetomium olivaceum SD-80A With Antimicrobial Activity

New Tetramic Acids Comprising of Decalin and Pyridones From Chaetomium olivaceum SD-80A With Antimicrobial Activity Decalin-Containing Tetramic Acids and 4-Hydroxy-2-pyridones with Antimicrobial and Cytotoxic Activity from the Fungus Coniochaeta cephalothecoides Collected in Tibetan Plateau (Medog) Decalin-Containing Tetramic Acids and 4-Hydroxy-2-pyridones with Antimicrobial and Cytotoxic Activity from the Fungus <i>Coniochaeta cephalothecoides</i> Collected in Tibetan Plateau (Medog) Cytotoxic, anti-biofilm and antimicrobial polyketides from the plant associated fungus Chaetosphaeronema achilleae Polycyclic Macrolactams Generated via Intramolecular Diels–Alder Reactions from an Antarctic <i>Streptomyces</i> Species Polycyclic Macrolactams Generated via Intramolecular Diels–Alder Reactions from an Antarctic <i>Streptomyces</i> Species Alchivemycin A, a Bioactive Polycyclic Polyketide with an Unprecedented Skeleton from <i>Streptomyces</i> sp. Exploiting an intramolecular Diels–Alder cyclization/dehydro-aromatization sequence for the total syntheses of ellipticines and calothrixin B Chetracin A and chaetocins B and C, three new epipolythiodioxopiperazines from Chaetomium spp. Genome-Mined Diels–Alderase Catalyzes Formation of the <i>cis</i>-Octahydrodecalins of Varicidin A and B