3 u2032 7 16 1h dd j 8 0 2 8 hz h 4 u2032 7 63 1h d j 2 8 hz h 6 u2032 7 69 1h d j 8 0 hz h 5 7 85 1h d j 16 0 hz h u03b1 7 88 1h dd j 8 0 2 8 hz h 6 8 06 1h d j 16 0 hz h u03b2 8 16 1h bs oh 5 u2032 8 19 1h d j 2 8 hz h 2 12 16 1h s oh 2 u2032 0118 13 c nmr cd 3 2 co u03b4 116 5 c 6 u2032 120 2 c u03b1 121 3 c 1 u2032 124 6 c 3 u2032 126 9 c 4 u2032 130 4 c 6 131 8 c 2 132 6 c 5 134 2 c 1 135 3 c 3 137 2 c 4 143 6 c u03b2 151 0 c 5 u2032 158 6 c 2 u2032 195 1 co eims 70 ev m z rel int 308 m 8 163 21 136 100 a mixture of compound 4 7 7 g 25 mmol ethyl iodide 8 1 g 52 mmol and potassium carbonate 15 g 25 mmol in dmf 50.