Invert regex match

Hello,

I would like to invert my regex match

Example:

sssd;RS=93298723;f

My current regex :

RS=d*

This regex would match RS=93298723, I would want to invert the match, see demo here regex101.com/r/PGkwA5/1

Thank you.

I found !

([^0-9-RS=]+)