• Excerpts from R. B. Woodward Vitamin B₁₂ Lecture
  
  Excerpts (18 min) from the lecture given November 27, 1972.
  The Total Synthesis of Vitamin B₁₂
  Harvard University, Cambridge, Massachusetts
• R. B. Woodward Vitamin B₁₂ Lecture (in 4 Parts)
  
  The Total Synthesis of Vitamin B₁₂
  Harvard University, Cambridge, Massachusetts
  
  Introduction by Professor David Dolphin (ca. 35 min) and
  lecture by Professor Woodward (ca. 3 hours).
• R. B. Woodward Erythromycin Synthesis Lecture
  
  Recent Advances in the Chemistry of Natural Products
  (progress toward the synthesis of erythronolide A)
  University of Wisconsin, Madison, Wisconsin.
  March 15, 1979
  
  Introduction by Professor Howard E. Zimmerman.
  Thanks to Prof. Zimmerman for locating the date and occasion*
  of this lecture.
  *Dedication of the Samuel M. McElvain Laboratories
  of Organic Chemistry at UWM.

Thanks to Professor Addison Ault of Cornell College for making
available a DVD version of these videos.
Thanks to Stephen S. Humble, Rajan N. Vatassery, and Daniel J. Marell
for assistance in creation and uploading of these iMovie files.