... OH 25 Page 3. 2104 J. Org. ... Analytical data were obtained by the Physical and Analytical Chemistry Research Department of The Upjohn Co. ... The solvent system A-IX8 is the organic layer from an equili- hrated mixture of 90 mL 'of ethyl acetate, 20 mL of acetic acid, 50 mL of 2,2,4 ...