candidate: They are : Robert B. Woodward ( Chemistry , 1965 ) Robert S. Mulliken ( Chemistry , 1966 ) H. Gobind Khorana ( Medicine & Physiology , 1968 ) Geoffrey Wilkinson ( Chemistry , 1973 ) Charles J. Pedersen ( Chemistry 1987 ) Sidney Altman and Thomas R. Cech ( Chemistry , 1989 ) Elias J. Corey ( Chemistry , 1990 ) Mario Molina ( Chemistry , 1995 ) K. Barry Sharpless ( Chemistry , 2001 ) Aaron Ciechanover ( Chemistry , 2004 ) Richard R. Schrock ( Chemistry , 2005 ) .