Faropenem Catalogue F530660 CAS 122547-49-3 M.W 284.31 22.99 M.F C12H14NO5S. Na Specifications FAQs Synonyms:(5R,6S)-6-((R)-1-hydroxyethyl)-7-oxo-3-((S)-tetrahydrofuran-2-yl)-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate, sodium salt (1:1)