Ansamycin
![Structure of geldanamycin, one of the benzoquinone ansamycins.](/Images/godic/202412/21/Geldanamycin.svg5728.png")
Ansamycins is a family of secondary metabolites that show antimicrobial activity against many Gram-positive and some Gram-negative bacteria and includes various compounds, among which: streptovaricins and rifamycins. In addition, these compounds demonstrate antiviral activity towards bacteriophages and poxviruses.