mestranol ( 0.7 and 0.32 % of the dose ) , 17alpha-ethynylestradiol ( 6.6 and 11.3 % ) and 2-hydroxy-17alpha-ethynylestradiol ( 0.64 and 0.7 % ) were identified as metabolite aglycons by reverse isotope dilution after ketodase hydrolysis of the urine from two of the women .
C0025506
mestranol
C0015011
ethynylestradiol