| DECHEMA ID | 41914 |
| Formula | C21H28O2 |
| Synonym | levonorgestrel |
| Synonym | Microlut |
| Synonym | D(-)-13β-ethyl-17α-ethynyl-17β-hydroxygon-4-en-3-one |
| Synonym | 17β-Hydroxy-18-methyl-19-nor-17a-pregn-4-en-20-yn-3-one |
| Synonym | (-)-13-ethyl-17-ethynyl-17-hydroxy-1,2,6,7,8,9,10,11,12,13,14,15,16, 17-tetradecahydrocyclopenta[a] phenanthren-3-one |
| Synonym | Microval |
| Synonym | 18-methyl-17-α-ethynyl-19-nortestosterone |
| Synonym | 13β-ethyl-17α-ethynyl-17β-hydroxygon-4-en-3-one |
| Synonym | (8R,9S,10R,13S,14S,17R)-13-ethyl-17-ethynyl-17-hydroxy-1,2,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-3H-cyclopenta[a]phenanthren-3-one |
| Synonym | 17α-ethynyl-18-methyl-19-nortestosterone |
| InChi-Key | WWYNJERNGUHSAO-UHFFFAOYSA-N |
| Registry No. | 797-63-7 |