SEARCH Articles Figures Tables Methyl ester pentalenolactone Paraldol Pentalenolactones Pentalenic acid Pentalenolactone Pentalenolacton biosynthesis Pentalenolactone Pentalenolactone E methyl ester Pentalenolactone E methyl ester via Pauson-Khand reaction Pentalenolactone antibiotic Pentalenolactone biosynthesis Pentalenolactone intermediate Pentalenolactone via photoisomerization Pentalenolactone, synthesis Pentalenolactones synthesis Streptomyces pentalenolactone