Ethinyl estradiol
Interesting Facts About (13S,17R)-17-ethynyl-13-methyl-7,8,9,11,12,14,15,16-octahydro-6H-cyclopenta[a]phenanthrene-3,17-diol
This compound, a sophisticated steroid derivative, has been a subject of fascination in the field of chemistry due to its complex structure and potential biological activity.