英文名称:Pregna-1,4,7,9(11)-Tetraene-3,20-Dione, 17,21-Dihydroxy-16-Methyl-, (16Α)-; Dexamethasone EP Impurity K; Dexamethasone Ep Impurity K / Δ7,9 (11)-Dexamethasone; (10S,13S,14S,16R,17R)-17-Hydroxy-17-(2-Hydroxyacetyl)-10,13,16-Trimethyl-12,14,15,16-Tetrahydro-6H-Cyclopenta[A]Phenanthren-3-One