| 摘要 |
There are provided antibiotics X-14873 A, G and H of the formulas <IMAGE> I wherein for X-14873A, R1 is CO2H and R2 is <IMAGE> for X-14873G, R1 is hydrogen and R2 is <IMAGE> and for X-14873H, R1 is hydrogen and R2 is <IMAGE> The compounds exhibit antibiotic activity. Also disclosed is a process to produce the above compounds. |
