... (4) (a) Bartmann, W.; Beck, G.; Lerch, U.; Teufel, H.; Babej, M.; Bickel, M.; Schoelkens, B.; Seeger, K. In 'Chemistry Biochemistry and ... Page 5. Synthetic Approaches to 11-Deoxyprostaglandins J. Org. Chem., Vol. 47, No. 12, 1982 2383 ... (3 X 250 mL) and the organic extract was ...