Beclometasone (Beclomethasone) Dipropionate EP Impurity Q Catalogue L326527 CAS N/A M.W 470.61 M.F C28H38O6 Specifications FAQs 2-oxo-2-((8R,9S,10R,13S,14S,16S,17R)-10,13,16-trimethyl-3-oxo-17-(propionyloxy)-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[a]phenanthren-17-yl)ethyl propionate