A mixture of monoacetyldiglycerides was newly isolated from the chloroform extract of antlers of Cervus nippon, guided by the hematopoietic stimulation of stem cells. The structures of monoacetyldiglycerides were determined by various spectroscopic methods: FAB MS, CID tandem MS, and 1D and 2D NMR. A mixture of at least nine inseparable sn-3-monoacetyldiglycerides was identified: 1 [C39H72O6 (C16 : 0/C18 : 1)], 2 [C39H72O6 (C18 : 1/C16 : 0)], 3 [C39H70O6 (C16 : 0/C18 : 2)], 4 [C39H70O6 (C18 : 2/C16 : 0)], 5 [C41H74O6 (C18 : 0/C18 : 2), 6 [C41H74O6 (C18 : 2/C18 : 0)], 7 [C41H74O6 (C18 : 1/C18 : 1)], 8 [C43H74O6 (C18 : 0/C20 : 4)], and 9 [C43H74O6 (C20 : 4/C18 : 0)]. Among these nine monoacetyldiglycerides in deer antlers, compound 3 was one of the major compounds and was efficiently synthesized from glycerol. Spectral data of synthetic monoacetyldiglyceride 3 were compared with the corresponding data for the mixture of natural monoacetyldiglycerides. The mixture of natural monoacetyldiglycerides from deer antlers showed potent activity on the hematopoiesis (stimulation index=1.40±0.05, p<0.02 at 1 μg/ml), and synthetic monoacetyldiglyceride 3 showed even better activity (stimulation index=1.54±0.12, p<0.001, at 1 μg/ml).
一种新分离的单乙酰基
甘油酯混合物来自于日本鹿(Cervus nippon)角的
氯仿提取物,研究是基于其对干细胞的造血刺激作用。通过多种光谱学方法(FAB MS、CID串联MS以及1D和2D NMR)确定了单乙酰基
甘油酯的结构。鉴定出至少九种不可分离的sn-3-单乙酰基
甘油酯:1 [C39H72O6 (C16:0/C18:1)]、2 [C39H72O6 (C18:1/C16:0)]、3 [C39H70O6 (C16:0/C18:2)]、4 [C39H70O6 (C18:2/C16:0)]、5 [C41H74O6 (C18:0/C18:2)]、6 [C41H74O6 (C18:2/C18:0)]、7 [C41H74O6 (C18:1/C18:1)]、8 [C43H74O6 (C18:0/C20:4)] 和 9 [C43H74O6 (C20:4/C18:0)]。在这些鹿角中的九种单乙酰基
甘油酯中,化合物3是主要化合物之一,并且可以高效地从
甘油合成。合成的单乙酰基
甘油酯3的光谱数据与天然单乙酰基
甘油酯混合物的相应数据进行了比较。来自鹿角的天然单乙酰基
甘油酯混合物表现出强大的造血活性(刺激指数=1.40±0.05,p<0.02在1 μg/ml时),而合成的单乙酰基
甘油酯3表现出更好的活性(刺激指数=1.54±0.12,p<0.001,在1 μg/ml时)。