对子宫内膜孕酮受体的亲和力比黄体酮强5倍；服用不同的米非司酮的剂量会达到不同的效果，通常情况下，每次服用米非司酮10至25毫克可用于紧急避孕；服用150毫克可终止49天内的妊娠。

米非司酮

中文同义词: 米非司酮;米非司酮(RU486);11Β-[4-(N,N-二甲胺基)]苯基-17Β -羟基-17Α-(1-丙炔基)-雌甾-4,9-二烯-3-酮;(1LΒ,17Β)-11-[4-(二甲氨基)苯基]-17-羟基-17-(1-丙炔基)雌甾-4,9-二烯-3-酮;含珠停;抗孕酮;米那司酮;息百虑

CAS号: 84371-65-3

含量：98%

分子式: C29H35NO2

分子量: 429.59

化学性质  熔点150℃。[α]D20+138.5°(C=0.5，氯仿)。急性毒性LD50小鼠(g/kg)：＞2.6腹腔注射。

用途  新型抗孕激素，并有抗糖皮质激素的活性，而无孕激素、雌性激素、雄性激素和抗雌性激素的活性。和孕酮受体的亲和力比黄体酮强5倍。用于抗早孕、催经止孕、胎死官内引产等。

Mifepristone

English Synonyms: 11-(4-(dimethylamino)phenyl)-17-hydroxy-17-(1-propynyl)-estra-9-dien-3-one;11beta-[4-(n,n-dimethylamino)phenyl]-17alpha-(prop-1-ynyl)-delta4,9-estradiene;17-beta)-(11-bet;17beta)-11-[4-(dimethylamino)-phenyl]-17-hydroxy-17-(1-propynyl)estra-(11bet;17-beta-hydroxy-11-beta-(4-dimethylaminophenyl-1)-17-alpha-(prop-1-ynyl)oest;-17beta-ol-3-one;4,9-dien-3-one;r38486

CAS NO.: 84371-65-3

Assay: 98%

Molecular Formula:C29H35NO2

Molecular Weight:429.59

Melting point: 150℃

Packing:1kg/tin

Usage: New anti-progesterone, and has anti-glucocorticoid activity, but not progesterone, estrogen, androgen and anti-estrogen activity. And progesterone receptor affinity 5-fold stronger than progesterone. For anti-early pregnancy, reminders by only pregnancy, fetal death, uterine induction of labor, etc.