The group that produced the peaks around 7 and 8 ppm is most likely an amide group.
"The various functional groups known as carboxylic acids can be converted into amides, which are functional groups made up of a carbonyl group and a nitrogen atom."
"If the two remaining bonds on the nitrogen atom are connected to hydrogen atoms, the chemical is a simple amide, which can be used to determine whether it belongs to the amide group or not."
"Examples of amides are nylon, paracetamol, Ammonia etc."
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