# How can I identify functional groups?

Then, the carbonyl groups would be the $\text{C"="O}$ of carbon-1 and carbon-3. The only other functional group is the secondary amine group on carbon-1. You can tell it's secondary from my writing N,N, which implies two substituents on the nitrogen. You could also say that the carbonyl on carbon-1 along with the "N"("CH"_3)_2 can be coupled together as one functional group called an amide.