... -one;3-Hydroxy-1,3,5-(10)-oestratrien-17-one;3-Hydroxy-1,3,5(10)-oestratrien-17-one;3- ... hydroxy-17-keto-estra-1,3,5-triene;3-Hydroxy-17-ketoestra-1,3,5-triene;3-hydroxy-17-keto-oestra ... -1,3,5-triene CAS NO.: 53-16 ... of pharmaceutical intermediates is ethinyl estradiol Email: ycgsales02@yccreate.com Phone:86-027-68886667 Tax:86-27-88048077