None as of yet.
Although Emacs' key bindings are notoriously long, they aren't all chosen randomly. In general, they are designated according to three rules:
C-x
reserved for Emacs native essential keybindings.C-c
reserved for users. Specifically, C-c letter
allocated for minor modes, C-c C-letter
allocated for major modes.C-h
following any prefix character (including C-c
).For an in-depth discussion, see this reddit post referencing this manual page.