Redirect URL containing #!

I have a Rewrite Rule that helps me redirect a page with no hindrance.

I am rewriting

mydomain.com/best

to

mydomain.com/#!/

using

RewriteRule ^\/best\/? /#!/ [R=301,NE,L]

Now I want to Rewrite

mydomain.com/#!/best

to

mydomain.com/#!/

using the same rule but it does not work and goes directly to

mydomain.com/#!/best

how can I solve this ?