Levonorgestrel cyclopropylcarboxylate

Levonorgestrel cyclopropylcarboxylate
Clinical data
Other names	HRP-003; HRP003; Levonorgestrel cyclopropyl-carboxylate; Levonorgestrel 17β-cyclopropylcarboxylate; 17α-Ethynyl-18-methyl-19-nortestosterone 17β-cyclopropylcarboxylate; 17α-Ethynyl-18-methylestr-4-en-17β-ol-3-one 17β-cyclopropylcarboxylate; 13-Ethyl-17α-hydroxy-18,19-dinorpregn-4-en-20-yn-3-one cyclopropanecarboxylate
Routes of; administration	Intramuscular injection
Drug class	Progestogen; Progestin; Progestogen ester
Identifiers
	IUPAC name [(8R,9S,10R,13S,14S,17R)-13-Ethyl-17-ethynyl-3-oxo-1,2,6,7,8,9,10,11,12,14,15,16-dodecahydrocyclopenta[a]phenanthren-17-yl] cyclopropanecarboxylate;
CAS Number	86679-35-8;
PubChem CID	10317658;
ChemSpider	8493122;
Chemical and physical data
Formula	C25H32O3
Molar mass	380.528 g·mol−1
3D model (JSmol)	Interactive image;
	SMILES CC[C@]12CC[C@H]3[C@H]([C@@H]1CC[C@]2(C#C)OC(=O)C4CC4)CCC5=CC(=O)CC[C@H]35;
	InChI InChI=1S/C25H32O3/c1-3-24-13-11-20-19-10-8-18(26)15-17(19)7-9-21(20)22(24)12-14-25(24,4-2)28-23(27)16-5-6-16/h2,15-16,19-22H,3,5-14H2,1H3/t19-,20+,21+,22-,24-,25-/m0/s1; Key:TZZXNSUFTUXHRE-AYEDEZQKSA-N;

Levonorgestrel cyclopropylcarboxylate (developmental code name HRP-003), or levonorgestrel 17β-cyclopropylcarboxylate, is a progestin and a progestogen ester which was studied for potential use as an injectable hormonal contraceptive but was never marketed. It was developed by the World Health Organization's Special Programme on Human Reproduction in the 1980s. Analogues of levonorgestrel cyclopropylcarboxylate include levonorgestrel cyclobutylcarboxylate (HRP-001) and levonorgestrel butanoate (HRP-002).