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The co-winner of the 2021 Nobel Prize in Chemistry, Germany's Benjamin List cheers with a bouquet of flowers and is applauded by colleagues at the Max Planck Institute in Muehlheim, western Germany on October 6, 2021, prior to a press conference. - Germany's Benjamin List and David MacMillan of the United States on October 6, 2021 won the Nobel Prize in Chemistry for their development of a precise new tool for molecular construction, the jury said. The duo was awarded "for their development of a precise new tool for molecular construction: organocatalysis. This has had a great impact on pharmaceutical research, and has made chemistry greener," the Nobel Committee said. (Photo by Ina Fassbender / AFP) (KEYSTONE/AFP/INA FASSBENDER)