Ethynylestradiol (20,21-13C2,99%) 100 µg/mL in Acetonitrile, 1,2ml Back Catalog number: CLM-3375-1.2 Availability: In the manufacturer's stock Price on request - + Recommended 97797 PAH Standard Price on request 90397 Surrogate Standard Price on request 672919 Fluoroglycofen-ethyl, 250mg Price on request