The phenyl group plays an important role in organic chemistry.

The carbonyl group plays an important role in organic chemistry.

The carboxyl group plays an important role in organic chemistry.

Compounds containing a propargyl group are often used in organic chemistry research.

The allyl group plays an important role in organic chemistry.

Kihan is my best friend.

The Labor Standards Inspection Office (Rōdō Kijun Kantokusho), or 'Rōki' for short, plays a crucial role in protecting the rights of workers.

This organism has a very complex anlage in the early stages of development.

By regularly checking the key performance indicators, you can understand the performance of the company and devise improvement measures.

The concept of chemical equivalent is essential for understanding chemical reactions.