13504-15-9

(8S,10S,13S,14S,16S,17R) Betamethasone Impurity C Betamethasone EP Impurity C Betamethasone Impurity 3（Betamethasone EP Impurity C） 16β-Methyl-17,21-dihydroxypregna-1,4,9(11)-triene-3,20-dione 17,21-Dihydroxy-16β-methylpregna-1,4,9(11)-triene-3,20-dione 17,21-dihydroxy-16beta-methylpregna-1,4,9(11)-triene-3,20-dione 17, 21-dihydroxy-16β-methylpregna-1, 4, 9(11)-triene-3,20-dione (16β)-17,21-Dihydroxy-16β-methyl-pregna-1,4,9(11)-triene-3,20-dione Pregna-1,4,9(11)-triene-3,20-dione, 17,21-dihydroxy-16-methyl-, (16β)- (8S,10S,13S,14S,16S,17R)-17-hydroxy-17-(2-hydroxyacetyl)-10,13,16-trimethyl-7,8,12,14,15,16-hexahydro-6H-cyclopenta[a]phenanthren-3-one (8S,10S,13S,14S,16S,17R)-17-hydroxy-17-(2-hydroxyacetyl)-10,13,16-trimethyl-6,7,8,10,12,13,14,15,16,17-decahydro-3H-cyclopenta[a]phenanthren-3-one Betamethasone impurity 2/Betamethasone EP Impurity C/(8S,10S,13S,14S,16S,17R)-17-Hydroxy-17-(2-hydroxyacetyl)-10,13,16-trimethyl-6,7,8,10,12,13,14,15,16,17-decahydro-3H-cyclopenta[a]phenanthren-3-one