CAS 111668-12-3 is the registry number for 2-((8S,10S,13S,14S)-10,13-Dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl methanesulfonate, Prednisolone Impurity, 97%. Offered by: Fluorochem. Available pack sizes: 100mg.