Consider Structure in a Molecule's Nature

I would ... change the accepted rule that the nature of a complex molecule is determined by the nature, quantity, and position of its elementary component parts, by the following statement: the chemical nature of a complex molecule is determined by the nature of its elementary component parts, their quantity and chemical structure.

Aleksandr Mikhaĭlovich Butlerov, Sur la structure chimique de quelques hydrocarbures non-saturés (1870)

• chemistry
• molecules