Beclometasone (Beclomethasone) Dipropionate EP Impurity I Catalogue L326519 CAS 52092-12-3 M.W 468.59 M.F C28H36O6 Specifications FAQs 2-oxo-2-((8S,10S,13S,14S,16S,17R)-10,13,16-trimethyl-3-oxo-17-(propionyloxy)-6,7,8,10,12,13,14,15,16,17-decahydro-3H-cyclopenta[a]phenanthren-17-yl)ethyl propionate