I am trying to destring a variable which occasionally contains the backtick ` symbol. I am just not being able to make it work.

Here is a trivial data example:

Code:
clear
input str12 mobile_no1
"`7541929932"
end
Here are all the destring commands I have tried:
Code:
destring mobile_no1, replace ignore("`")
destring mobile_no1, replace ignore("\`")
destring mobile_no1, replace ignore("`=char(96)'")
destring mobile_no1, replace ignore(`"`"')
destring mobile_no1, replace ignore(`"\`"')
destring mobile_no1, replace ignore(`"`=char(96)'"')
They all scream:
Code:
too few quotes
r(132);
What am I doing wrong?