Table 1 1 H in Amaryllidaceae alkaloids from Narcissus pseudonarcissus L. cv. Dutch Master as potential drugs in treatment of Alzheimer's disease

Table 1 1 H-NMR and 13 C-NMR data of new alkaloid 6 (diastereomeric ratio 1:1.1) isolated from Narcissus pseudonarcissus cv. Duch Master.
POSITIONNARCIMATULINEδC ofδH of isomer AδC ofδH of isomer Bisomer Aisomer B129.72.39–2.26 m29.62.39–2.26 m1.84–1.64 m1.84–1.64 m235.72.39–2.26 m35.62.39–2.26 m2.13–1.98 m2.13–1.98 m3209.2209.2440.02.60 dd, overlapped40.02.56 dd, overlapped(18.4, 2.9)(18.0, 2.9)4a88.34.68 t (2.9)88.24.55 t (2.9)5a146.7146.76143.6143.67110.96.65 d, overlapped111.06.62 d, overlapped(8.0)(8.0)8122.236.44 d (8.0)122.206.56 d (8.0)8a129.9129.98b132.0132.0957.63.88 d, overlapped57.93.98 d (15.0)(15.0)3.66 d (15.0)3.51 d (15.0)1152.33.05–2.88 m51.13.05–2.88 m2.86–2.74 m1237.42.13–1.98 m36.41.84–1.64 m1.56–1.50 m1.38–1.31 m1347.547.41′54.93.45 d (14.2)53.73.35 bs3.33–3.24 m2′122.8122.83′108.77.01 s108.47.07 s3a′146.9146.95′101.06.00–5.98 m100.96.00–5.98 m6a′146.0145.87ֹ’110.56.74 s110.36.77 s8′133.6133.49′131.7131.410′130.46.83 d (7.4)130.26.71 d, overlapped(7.4)11′117.96.68 t, overlapped117.96.62 t, overlapped(7.4)(7.4)12′123.227.03 d, overlapped123.247.03 d, overlapped(7.4)(7.4)12a′131.0131.013′28.63.05–2.88 m28.53.05–2.88 m2.86–2.74 m2.86–2.74 m14′57.13.33–3.24 m56.93.33–3.24 m3.18 dd (17.5, 8.8)3.09 dd (18.4, 9.2)15a′150.5150.4N15′-CH338.82.25 s38.72.20 sC6-OCH355.963.86–3.83 m55.953.86–3.83 m
Spectra were acquired in chloroform-d at 500 MHz (1 H) and 125.7 MHz (13 C);
1 J values are in parentheses and reported in Hz; chemical shifts are given in ppm.