Get a single texture from multiply one (from atlas)

Hello everyone! I need to get a texture of a sprite renderer.

If I write this code, it returns the whole atlas, but I need just the part, which actually renders

GetComponent<SpriteRenderer>().sprite.texture; // This returns the whole atlas

I just need this little part, not the whole atlas:

[84639-безымянныи.png|84639]

Any help?
I need this part