Complex sentence: The compound was discovered by the German chemist Adolf von Baeyer on December 4,1864, the feast of Saint Barbara (who gave the compound its namesake), by combining urea and malonic acid in a condensation reaction.
Split into simpler sentences: The compound was discovered by the German chemist Adolf von Baeyer on 4. December 1864--the feast of St Barbara and therefore the name given to the compound--by combining urea and malonic acid in a condensation reaction.