OH OH OH Q 0 0 ab C b' dem/e 125 m/e 126 m/e 127 m/e 128 m/e 110 m/e 82 revealed weak absorptions at 1710 and 1730-1745 cm-l, respectively, and left those frequencies unassigned.'The 1710-1743-and the 1748-cm-1 absorptions may indicate that the reductones and crystalline 3 contain, in small amounts, an unenoliaed ane-1, 3-dione B ring structural contributor. 14 The strong, broad absorption at 1706 cm-l was assigned to both ...
