dibenzyl 1-bromo-2-(methylthio)carbapenam-3,3-dicarboxylate

dibenzyl 2-<2,2-bis(methylthio)ethyl>-α-chloro-4-oxo-1-azetidinemalonate

dibenzyl α-chloro-2-<2-(methylsulfinyl)-2-(methylthio)ethyl>-4-oxo-1-azetidinemalonate

exo-3-phenyl-exo-tricyclo<3.2.1.02,4>octane

4-(6c-methoxy-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-5r-yl)-benzoic acid benzyl ester