孕二烯酮+炔雌醇
gestodene+ethinylestradiol
左炔诺孕酮+炔雌醇
levonorgestrel+ethinylestradiol
左炔诺孕酮炔雌醇
Levonorgestel and ethinglestradiol tablets
醇酮-烯二醇互变
acyloin-endiol tautomerism
17-α-羟孕烯醇酮
17-alpha-hydroxypregnenolone
醋酸甲羟孕酮+雌酮
medroxyprogesterone acetate+estrone
复方孕二烯酮片
compound gestodene tablet
左炔诺孕酮炔雌醚
Levonorgestrel quinestrol