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),
https://www.knockoutrat.org/shop/rw2-1a00110-6beta-hydroxy-ethinyl-estradiol-25-mg-6r-8r-9s-13s-14s-17r-17-ethynyl-13-methyl-78911121314151617-decahydro-6h-cyclopenta-a-phenanthrene-3617-triol-302501
https://www.knockoutrat.org/web/image/product.template/302501/image_1920?unique=813f639
This 6Beta-Hydroxy is guaranteed a Ethinyl with the use of Estradiol (25 and directly supplied to your lab by Gentaur's warehouse.
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