从中药知母(Anemarrhena asphodeloides Bge.)的70%乙醇提取物中分离得到6个化合物,经波谱学方法和与已知样品对照鉴定为:3-O-β-D-glucopyranosyl-(1→2)-β-D-galactopyranosyl-(3β,5β)-pregn-16(17)-ene-20-one (1)、timosaponin AⅢ (2)、timosaponin BⅢ (3)、