Faropenem Impurity 6 Catalogue F530666 CAS N/A M.W 241.31 M.F C11H15NO3S Specifications FAQs (5R,6S)-6-((R)-1-hydroxyethyl)-3-((R)-tetrahydrofuran-2-yl)-4-thia-1-azabicyclo[3.2.0]hept-2-en-7-one