1 H NMR δ 0 . 7 - 0 . 8 ( br m , 2 H ) , 1 . 85 - 1 . 9 ( m , 1 H ) , 2 . 15 - 2 . 2 ( m , 1 H ) , 2 . 2 - 2 . 3 ( m , 1 H ) , 3 . 4 - 3 . 5 ( m , 1 H ) , 3 . 7 ( d , 6 H ) , 4 . 2 ( s , 1 H ) , 4 . 95 ( s , 1 H ) , 6 . 75 - 6 . 8 ( br m , 1 H ) , 6 . 85 - 6 . 9 ( br m , 1 H ) , 7 . 0 ( s , 1 H ) , 7 . 5 ( m , 1 H ) , 7 . 6 ( m , 1 H ) , 7 . 7 ( s , 0 . 5 H ) , 7 . 8 ( s , 0 . 5 H ) , 8 . 85 ( s , 0 . 5 H ) , 9 . 1 ( s , 0 . 5 H ) , 9 . 35 ( s , 0 . 5 H ) , 9 . 45 ( s , 0 . 5 H ) ; MS m / z 347 . 2 ( M + H ) , 279 . 2 ( M - C 3 H 3 N 2 · ) , 137 . 5 ( M - C 9 H 13 N 4 S · )