Dear Mr. Khattab,

Is the figure your study case?

HRMS would be a good option,especially ion mobility.

Hi Gustavo,

please make your question more clear.

it is a general example.

Thanks, Clemens.

But the molecule still has other aromatic Hs, which may interfere. 

Yes.

Thanks so much for your comprehensive answer.

T1 Measurement technique using Bruker Topspin will also help you.

I feel apart from NMR, careful observation of the FTIR spectra of the 3 isomers would also be able to clearly differentiate between the three isomers.

I agree fully with the excellent answers of the answerers. According to :

- Clemens   and his answer :  he wrote the magic word : BOSUTINIB

Clemens Anklin · 49.42 · 199.87 · Bruker Corporation

Dear Mohammed,

Bosutinib?

13C NMR helps identify the symmetric molecule as the count of carbon........

Have you read this link :

http://blogs.sciencemag.org/pipeline/archives/2012/05/14/bosutinib_dont_believe_the_label

IF YES  you have your answer in it.

IF NOT, please contact our common friend  GOOGLE or GOOGLE Scholar prior you post an OBSCURE  (link answers  were posted 2012)

AND OBSOLETE question!!

JRG