Aromaticity is not limited to single-ring systems. Polycyclic aromatic compounds (PACs), which consist of multiple fused ...
Arginine (Arg, R): Arginine has a guanidinium group as its R group, a complex nitrogen-containing group that is positively ...
This illustration visualizes a novel electrochemical transformation in which a single carbon atom—derived from a diazo compound—is selectively inserted into the pyrrole ring via a distonic radical ...