Task: Text Categorization
Input (English): Charles Pedersen shared the 1987 Nobel Prize in Chemistry for their discovery, in which his strategy for their synthesis was to link catechols via hydroxyl groups. The 18-6 type is notably toxic to humans and exemplifies how these compounds are capable of coordinating with a wide variety of alkali metal cations. They are always composed of a number of ethyleneoxy units linked together in a ring, and rings featuring internal oxygens characterize them. For ten points, name these compounds, named for their resemblance to royal headgear.
Output (English): Science