Discover the name of buttons on advanced tool bar (Tinymce)

Hello my friends,

I hope are you well.

I want to hide some of the buttons "advanced tool bar" in creating a post. I found this tutorial (https://codex.wordpress.org/Plugin_API/Filter_Reference/mce_buttons,_mce_buttons_2,_mce_buttons_3,_mce_buttons_4), but I do not know how to discover the name of the buttons.

I would like to hide the following buttons:

> Revolution slider
> WP User Avatar
> Layer slider

If you know of any tutorial where I can learn to discover the name of the button, I would be grateful.

Regards,
Jader Silva