(2S-(2alpha,5alpha,6beta))-6-(((Hexahydro-1H-azepin-1-yl)methylene)amino)-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo(3.2.0)heptane-2-carboxylic acid monohydrochloride 32887-08-4 EINECS 251-279-2