1 H NMR δ 1 . 2 - 1 . 3 ( m , 1 H ) , 1 . 35 - 1 . 5 ( br m , 5 H ) , 1 . 85 - 2 . 0 ( br m , 4 H ) , 2 . 4 - 2 . 6 ( br m , 2 H ) , 3 . 4 - 3 . 5 ( m , 2 H ) , 3 . 7 ( s , 3 H ) , 3 . 8 ( m , 2 H ) , 6 . 8 ( m , 3 H ) , 7 . 0 ( s , 1 H ) , 7 . 3 ( m , 2 H ) , 7 . 5 ( s , 1 H ) , 9 . 2 ( t , 1 H ) ; MS m / z 358 . 3 ( M + H ) , 290 . 3 ( M - C 3 H 3 N 2 · )