Glysperin B has anti-Gram positive bacteria and negative bacteria (including aminoglycoside antibiotic resistant bacteria) activity[1].
References
[1] T Tsuno, et al. Glysperin, a new antibiotic complex of bacterial origin. II. Structures of glysperins A, B and C. J Antibiot (Tokyo). 1981 Apr;34(4):390-402.
