This world continues to give rise to innumerable changes.

Pentadecane is produced in this chemical reaction.

This compound is an organic chemical called pentacosane.

In organic chemistry, pentatriacontane is a saturated hydrocarbon consisting of 36 carbon atoms.

He likes wearing suspenders.

He said, 'Where there is a will, there is a way,' and faced the difficult situation.

He strongly believes in the philosophical thought, 'I think, therefore I am.'

I am planning to go to Copenhagen next week.

Cyclopentane is a compound often used in organic chemistry.

He always keeps in mind the phrase 'If one learns without thinking, it is a waste.'