布地奈德杂质20
QY-BDND-20
2-((8R,10S,13S,16R,17S)-16,17-dihydroxy-10,13-dimethyl-3-oxo-6,7,8,10,12,13,16,17-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate