- Paul Josef Crutzen
- Paul John Flory
- Paul Hermann Muller
- Paul Delos Boyer
- Otto Wallach
- Otto Diels
- Odd Hassel
- Nikolai N. Semenov
- Michael Smith
- Melvin Calvin
- Max Bodenstein
- Mario Jos Molina
- Marcellin Berthelot
- Manfred Eigen
- Luis Federico Leloir Luis Federico Leloir
- Ludwig Mond
- Louis Pasteur
- Lloyd Quarterman
- Linus Carl Pauling
- Leopold Ruzicka