| Description | (-)-Mycousnine is a microbial metabolite and derivative of usnic acid originally isolated fromM. nawaethat has antibacterial and antifungal activities.1,2It is active against the Gram-positive bacteriaB. subtilis,K. rhizophila, andS. aureus(MICs = 4, 8, and 4 g/ml, respectively) but not the Gram-negative bacteriaE. coli,S. typhimurium, andK. pneumoniae(MICs = >128 g/ml for all).2(-)-Mycousnine is also active against the fungiT. mentagrophytes,T. rubrum, andC. albicans(MICs = 25, 25, and 100 μg/ml, respectively).1 |
| molecular weight | 376.36 |
| Molecular formula | C19H20O8 |
| CAS | 77480-55-8 |
| Storage | Powder: -20°C for 3 years | In solvent: -80°C for 1 year | Shipping with blue ice. |
| References | 1. Sassa, T., and Igarashi, M.Structures of (-)-mycousnine, (+)-isomycousnine and (+)-oxymycousnine, new usnic acid derivatives from phytopathogenic Mycosphaerella nawaeAgric. BioI. Chem.54(9)2231-2237(1990) 2. Lee, J., Lee, J., Kim, G.J., et al.Mycousfurans A and B, antibacterial usnic acid congeners from the fungus Mycosphaerella sp., isolated from a marine sedimentMar. Drugs17(7)422(2019) |