Contents

P1-185

Chemical compound

P1-185

Clinical data
Other names	(3E)-3-({[(2S)-2-Amino-3-methylbutanoyl]oxy}imino)pregn-4-en-20-one
Drug class	Progestogen; Neurosteroid
Identifiers
IUPAC name [(E)-[(8S,9S,10R,13S,14S,17S)-17-acetyl-10,13-dimethyl-1,2,6,7,8,9,11,12,14,15,16,17-dodecahydrocyclopenta[a]phenanthren-3-ylidene]amino] (2S)-2-amino-3-methylbutanoate
CAS Number	1185297-01-1
PubChem CID	44219330
ChemSpider	25052147
ChEMBL	ChEMBL565873
CompTox Dashboard (EPA)	DTXSID801148453
Chemical and physical data
Formula	C26H40N2O3
Molar mass	428.617 g·mol−1
3D model (JSmol)	Interactive image
SMILES CC(C)[C@@H](C(=O)O/N=C/1\CC[C@@]2([C@H]3CC[C@]4([C@H]([C@@H]3CCC2=C1)CC[C@@H]4C(=O)C)C)C)N
InChI InChI=1S/C26H40N2O3/c1-15(2)23(27)24(30)31-28-18-10-12-25(4)17(14-18)6-7-19-21-9-8-20(16(3)29)26(21,5)13-11-22(19)25/h14-15,19-23H,6-13,27H2,1-5H3/b28-18+/t19-,20+,21-,22-,23-,25-,26+/m0/s Key:JFIPYWOCXPCAFX-NPRMJFGVSA-N

P1-185, also known as progesterone 3-O-(L-valine)-E-oxime or as pregn-4-ene-3,20-dione 3-O-(L-valine)-E-oxime, is a synthetic progestogen and neurosteroid and an oxime ester analogue and prodrugofprogesterone (and by extension of allopregnanolone).^[1][2] It was developed as an improved water-soluble version of progesterone such that it could be formulated as an aqueous preparation and easily and rapidly administered intravenously as a potential therapy for traumatic brain injury.^[1][2] However, the chemical synthesis of P1-185 was described as somewhat challenging, so oxime conjugates of progesterone of the C20 instead of C3 position, such as EIDD-1723 and EIDD-036, have since been developed.^[2][3][4]

• List of neurosteroids § Inhibitory > Synthetic > Pregnanes
• List of progestogen esters § Oximes of progesterone derivatives

• Media related to P1-185 at Wikimedia Commons

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