对中药白英的生物碱类成分进行研究。采用ODS、硅胶柱层析和高效液相色谱相结合的方法对生物碱进行分离纯化。通过UHPLC-ESI-Q-TOF-MS、1D和2D NMR鉴定了7个生物碱类化合物, 分别为15β-ethoxy-(3β,5α,25R)-16,23-epoxy-23,24-imino-cholestan-16,20,23(N)-triene-3β-ol-3-O-β-D-glucopyranosyl-(1→2)-β-D-glucopyranosyl-(1→4)-β-D-galactopyranoside (1), 15β-hydroxyl-(3β,25R)-16,23-epoxy-23,24-imino-cholestan-5,16,20,23(N)-tetraene-3β-ol-3-O-β-D-glucopyranosyl-(1→2)-β-D-glucopyranosyl-(1→4)-β-D-galactop-yranoside (2), Solalyraine A (3), Solalyraine B (4), 16,23-epoxy-22,26-imino-cholest-22(N),23,25(26)-trien-3β-ol-3-O-β-D-glucopyranosyl-(1→2)-β-D-glucopyranosyl-(1→4)-β-D-galactopyranoside (5), N-(4-amino-butyl)-3-(3-hydroxy-4-methoxy-phenyl)-E-acrylamide (6) and magnoflorine (7)。其中化合物1和2为文献未报道的两个新的甾体糖苷类生物碱, 化合物7首次从白英中分离得到。