translate English to German: In water solution both forms are in equilibrium, and at pH 7 the cyclic one is the predominant. As the ring contains five carbon atoms and one oxygen atom, which resembles the structure of pyran , the cyclic form of glucose is also referred to as glucopyranose.
Sein Kollege Friedrich August Kekulé hielt den Namen Dextrose (von Latein isch dexter = rechts) für passender, da gewöhnlicher Traubenzucker die physikalische Eigenschaft besitzt, die Ebene des linear polarisierten Lichtes nach rechts zu verdrehen.