(2017/04/08)
(2008/06/13)
3-hydroxymethyl-8-oxo-7-[(2-thienylacetyl)amino]-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid diphenylmethyl ester
(6R,7R)-7-amino-3-hydroxymethyl-8-oxo-5-thia-1-aza-bicyclo[4.2.0]oct-2-ene-2-carboxylic acid
7-Aminocephalosporanic acid
(6R)-3-methylene-8-oxo-7t-(2-thiophen-2-yl-acetylamino)-(6rH)-5-thia-1-aza-bicyclo[4.2.0]octane-2c-carboxylic acid benzhydryl ester