4-Thia-1-azabicyclo(3.2.0)heptane-2-carboxylic acid, 3,3-dimethyl-7-oxo-6-((phenylacetyl)amino)- (2S-(2alpha,5alpha,6beta))-, mixt. with N-(7-((3-O-(aminocarbonyl)-6-deoxy-5-C-methyl-4-O-methyl-beta-L-lyxo-hexopyranosyl)oxy)-4-hydroxy-8-methyl-2-o