23284-15-3 4-Thia-1-azabicyclo(3.2.0)heptane-2-carboxylic acid, 6-(3-(o-chlorophenyl)-5-methyl-4-isoxazolecarboxamido)-3-3-dimethyl-7-oxo-, compd. with viomycin (3:1) Viomycin 3-o-chlorophenyl-5-methyl-4-isoxazolylpenicillinate Viomycin, tris(6-(3-(o-chlorophenyl)-5-methyl-4-isoxazolecarboxamido)-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo(3.2.0)heptane-2-carboxylate) (salt)