英文别名
levonorgestrel 17β-cyclobutylcarboxylate;levonorgestrel cyclobutylcarboxylate;13-Ethyl-17alpha-hydroxy-18,19-dinorpregn-4-en-20-yn-3-one cyclobutanecarboxylate;[(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] cyclobutanecarboxylate