1. 65-2.72 (4H, m, -C 6 H 5 ), 13 C NMR (CDCl 3 , 75 MHz):? 171;H Nmr;(12H, m, -C 6 H 5 ), 4.72 (1H, s, -CH ), 4.42 (2H, t
2. 38-3.14 (4H, m, -C 6 H 5 );H Nmr;12H, m, -C 6 H 5 ), 6.69 (1H, s, -CH ), 4.73 (2H, t, -CH 2 -
3. (12H, m, -C 6 H 5 ), 6.68 (1H, s;H Nmr;CDCl 3, 300 MHz): ? 9.28 (1H, s, -NH)