143667-45-2 4-Thia-1-azabicyclo(3.2.0)heptane-2-carboxylic acid, 3,3-dimethyl-6-((((((4-(methylamino)benzoyl)hydrazono)acetyl)amino)phenylacetyl)amino)-7-oxo-, (2S-(2-alpha,5-alpha,6-beta(S*)))-