c nmr cdcl 3 50 mhz u03b4 160 23 147 08 136 39 135 00 133 34 131 96 128 26 124 15 116 26 114 72 70 23 55 38 ms ei m z 300 m 248 212 185 107 65 anal calcd for c 16 h 13 cln 2 o 2 c 63 90 h 4 36 n 9 31 found c 64 01 h 4 54 n 9 46 1 h nmr cdcl 3 200 mhz u03b4 8 15 d 1h 7 77 d 1h 6 32 s 1h 5 81 s 1h 5 51 s 1h 3 81 s 3h 2 7 q 3h 1 3 t 3h 13 c nmr cdcl 3 50 mhz u03b4 167 39 149 27 147 78 140 28 139 62 137 77 129 62 126 34 69 79 51 60 25 76 14 72 ms ei m z 222 m 187 173 102 65 anal calcd for c 12 h 14 clno 3 c 56 37 h 5 52 n 5 19 found c 56 78 h 5 89 n 5 62 1 h nmr cdcl 3 200 mhz u03b4 8 1 s 1h 7 68 s 1h 6 22 s 1h 5 78 s 1h 5 23 s 1h 3 78 s 3h 2 58 t 2h 1 2 1 65 m 6h 0 9 t 3h 13 c.