地塞米松EP杂质A
QY-DSMS-A
(8R,9S,10R,11S,13R,14R,16R,17R)-14-fluoro-11,17-dihydroxy-17-(2-hydroxyacetyl)-10,13,16-trimethyl-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[a]phenanthren-3-one