Cirramycin A1 has anti-Gram-positive and negative bacterial activity, it is also effective against a variety of mycoplasmas, the minimum inhibitory concentration against Mycoplasmas pneumonia is 0.001 μg/mLs[1].
References
[1] H Tsukiura, et al. Studies on cirramycin A1. 3. Structure of cirramycin A1. J Antibiot (Tokyo). 1969 Mar;22(3):89-99.
