6Beta-Hydroxy Ethinyl Estradiol (25 mg) ((6R,8R,9S,13S,14S,17R)-17-ethynyl-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,6,17-triol),
This 6Beta-Hydroxy is guaranteed a Ethinyl with the use of Estradiol (25 and directly supplied to your lab by Gentaur's warehouse.
Internal Reference:
RW2-1A00110