26469-56-7 Hexanoic acid, 3,6-diamino-, monoester with (N-(N-((2-amino-6,7-dihydro-4-(2-oxo-4-imidazolidinyl)pyrrolo(1,2-a)-s-triazin-6-yl)carbonyl)-L-seryl)-L-seryl)urea,nicotinate (1:3) Viomycin nicotinate