1-Azabicyclo(3.2.0)heptane-2-carboxylic acid, 3-((2-((3-((2,4-dihydroxy-3,3-dimethyl-1-oxobutyl)amino)-1-oxopropyl)amino)ethyl)thio)-6-(1-hydroxy-1-methylethyl)-7-oxo-, (2S-(2alpha,3alpha(S*),5alpha,6beta))-