Jean-Marie Lehn - Jean-Marie Lehn conversing with young scientists. Jean-Marie Lehn - Jean-Marie Lehn holding his lecture 'Towards Adaptive Chemistry'. Jean-Marie Lehn - Jean-Marie Lehn delivering his lecture 'Towards Adaptive Chemistry' at the 64th Meeting. Jean-Marie Lehn - Jean-Marie Lehn delivering his lecture. Jean-Marie Lehn - Jean-Marie Lehn in discussion with young researchers during a lecture break. Jean-Marie Lehn - Jean-Marie Lehn presenting his lecture.