why do identical compounds have different chemical names

[Chocolate]

There are many, but let me give one example. Why does "Superdrol" go by the chemical names

2a,17a-dymethyl-5a-androst-3one-17b-ol
OR
2a,17a-dymethil-eticholan-3-one-17b-ol

Apparently the chemical structure varies slightly, so I would imagine different but similar results. Can someone enlighten me?

 

[jaycuda]

I know 5a-androst is the same as Etioallocholan, so maybe Etiocholan is as well?

 

[EasyEJL]

basically its because internationally there is more than one way to name the way the molecule is structured. that's what the "2a,17a-dymethyl-5a-androst-3one-17b-ol" as a name is, just a description of how the chemical bonds are in the item.

 

[Chocolate]

Thanks for clearing that up my friends