Arif DURSUN

You could search for this:

(?<!\btexts?\b.+)texts?

Then replace with this:

paragraph

Basically a negative lookbehind so you only find the first "text" or "texts" and then "text" or "texts".  Replace is simple as you are finding the first occurrence so you just replace it with whatever text you like.

Thanks Paul, works perfectly.

You could also simply look for the first occurrence, such as with

^(.*?)(\btexts?\b)

and replace with

$1paragraph

Tested and this formula captures more than it should.

Mea culpa, it should have been

^(.*?)(\btexts?\b)(.*)$

$1paragraph$3

This one matches the whole segment.

Arif DURSUN

I believe it's supposed to.  The use of the backreferences in the replace will put things back as intended.

Yes, tested and verified.

Paul and Anthony, I have a similar, yet different issue here, if I may.

I'd like to match the space (\s) + whatever the text until the first occurence of "içinde", and then move this string just after the "olarak,"

I tried to visualise it as below:

This is the actual text:

Bileşik 001a şema 11'in adım 65'inde bildirilen usule uygun olarak, metil 5-(2-((7-(2-(((tert-butoksi)amino)trimetil)piridin-4-il)-2-izobutilbenzofuran-5-il)metoksi)fenil)asetat'tan (21b) (200 mg, 0,349 mmol) DCM (20 mL) içinde, TFA (5,269 mL, 8,49 mmol) kullanılarak hazırlanmıştır.

(Content changed not to violate any right if any.)

I'd very much appreciate if you could offer a solution.

Arif DURSUN

So the replacement string should be like this?

Bileşik 001a şema 11'in adım 65'inde bildirilen usule uygun olarak, DCM (20 mL) içindemetil 5-(2-((7-(2-(((tert-butoksi)amino)trimetil)piridin-4-il)-2-izobutilbenzofuran-5-il)metoksi)fenil)asetat'tan (21b) (200 mg, 0,349 mmol) , TFA (5,269 mL, 8,49 mmol) kullanılarak hazırlanmıştır.

I'm sure not, but it would help if you could correct it so we see what it should look like.  Looks simple enough once we know what to do.