Cycloaddition
Amino Acid
Pyrrole
Furan
Furfural
Hydroxymethylfurfural (HMF)

5-Hydroxymethylfurfural (5-HMF) is one of the most promising molecules with huge synthetic potential.

https://en.m.wikipedia.org/wiki/Nitrile

https://en.m.wikipedia.org/wiki/Nisin

https://en.m.wikipedia.org/wiki/Nitrone

https://en.m.wikipedia.org/wiki/Nitronate

https://en.m.wikipedia.org/wiki/N-Oxoammonium_salt