[Anthasci]

Greetings!

I am trying to solve a 1H NMR spectrum of a known compound, i.e. assigning the peaks and calculating coupling values. I have here a picture of a signal



So, it definitely is a quintet, which makes sense as the C-atom in question is surrounded by two CH₂ atoms. I should therefore obtain two J-values, but I am having trouble confirming picking the points as the signal is faint and I do not observe splitting. How do you recommend I approach?

Thanks for the clarification!