eidd-1723 eidd-1723 eidd-1723, also known as eprx-01723 or as progesterone 20e-oxime] sodium salt, is a synthetic, water-soluble analogue of progesterone and a neurosteroid which was developed for the potential treatment of traumatic brain injury. it is a rapidly converted prodrug of eidd-036 (eprx-036; progesterone 20-oxime), which is considered to be the active form of the agent. previous c3 and c20 oxime derivatives of progesterone, such as p1-185 (progesterone 3-o-(l-valine)-e-oxime), were also developed and studied prior to eidd-1723. eidd-1723clinical dataother namesprogesterone 20e-oxime] sodium salt; pregn-4-ene-3,20-dione 20e-oxime] sodium saltdrug classneurosteroididentifiers iupac name pregn-4-ene-3,20-dione 20e-oxime] sodium salt cas number1659302-89-2chemical and physical dataformulac22h32nna2o6pmolar mass483.452 g·mol−13d model (jsmol)interactive image smiles c/c(1cc2()3()ccc4=cc(cc4(c)3()cc12c)=o)=n\ocop()()=o.. inchi inchi=1s/c22h34no6p.2na/c1-14(23-28-13-29-30(25,26)27)18-6-7-19-17-5-4-15-12-16(24)8-10-21(15,2)20(17)9-11-22(18,19)3;;/h12,17-20h,4-11,13h2,1-3h3,(h2,25,26,27);;/q;2*+1/p-2/b23-14+;;/t17-,18+,19-,20-,21-,22+;;/m0../s1key:sxdghawshqzkqm-zzsmyoissa-l