QRegExp: get the parsed string

[trallallero]

I have for example this string:
"DLH3029 (LUFTHANSA THREE ZERO TWO NINER)"

that should become:
'LUFTHANSA THREE ZERO TWO NINER'

so I use this regex:

echo "DLH3029 (LUFTHANSA THREE ZERO TWO NINER)" | sed "s/[^(]*(\([^)]*\)).*/'\1'/"

echo "DLH3029 (LUFTHANSA THREE ZERO TWO NINER)" | sed "s/[^(]*(\([^)]*\)).*/'\1'/"

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How can now use it in a Qt program ?

I've tried but I cannot find a way to make it work.