Marcellin Berthelot
Pierre Eugène Marcellin Berthelot (French: [bɛʁtəlo]; 25 October 1827 – 18 March 1907) was a French chemist and Republican politician noted for the Thomsen–Berthelot principle of thermochemistry. He synthesized many organic compounds from inorganic substances, providing a large amount of counter-evidence to the theory of Jöns Jakob Berzelius that organic compounds required organisms in their synthesis.