摘要:
从毛头鬼伞子实体中萃取得到乙醇、乙酸乙酯、石油醚3种有机提取物,采用a-葡萄糖苷酶活性抑制实验对3种有机提取物的抗糖尿病活性进行评价,结果显示,乙酸乙酯提取物对α-葡萄糖苷酶有较强的抑制活性.采用柱层析技术从乙酸乙酯提取物中分离纯化出10种化合物,经核磁等方法鉴定为:(1)顺,顺-9,12-十八(碳)二烯酸;(2)顺式-9-十八烯酸;(3)(22E,24R)-麦角甾烷-5,7,22-三烯-3β醇;(4) 33-5α-6α-22E-麦角甾-7,22-双烯-3,5,6-三醇-6-亚油酸酯;(5)3β-5α-6α-22E-麦角甾-7,22-双烯-3,5,6-三醇-6-油酸酯;(6)邻苯二甲酸二异丁酯;(7)对羟基苯乙醇;(8)4-羟基苯乙基乙酸酯;(9) 3-(4-羟基-3-甲氧苯基)败脂酸;(10)N-反式-3,4亚甲二氧基肉桂酰基-3-甲氧基酪胺.对分离化合物的α-葡萄糖苷酶活性抑制实验结果显示,N-反式-3,4亚甲二氧基肉桂酰基-3-甲氧基酪胺对α-葡萄糖苷酶具有较强的抑制活性,其ICs0值为4.17mg/mL.%The powdered fruit bodies of Coprinus comatus were firstly extracted by ethanol and the ethanol extract was then reextracted sequentially by ethyl acetate and petroleum ether.The anti-diabetic activity of each extract was evaluated by α-glucosidase inhibition assay.The results showed that ethyl acetate extract (EAE) had better anti-diabetic activity than others.Ten compounds from EAE were isolated by column chromatography and identified by spectroscopic methods including NMR and MS.These compounds were (1) cis,cis-9,12-octadecadienoic acid,(2) cis-9-octadecenoic acid,(3) (22E,24R)-ergosterol-5,7,22-triene-3β-alcohol,(4) 3β-5α-6α-22E-ergosterol-7,22-diene-3,5,6-triol-6-linoleate,(5) 3β-5α-6α-22E-ergosterol-7,22-diene-3,5,6-triol-6-oleate,(6) diisobutyl phthalate,(7) p-hydroxy benzene ethanol,(8) 4-hydroxy phenethyl acetate,(9) 3-(4-hydroxy-3-) fatty acid,and (10) N-trans-3,4-methylenedioxy cinnamic acyl-3-methoxy tyramine.N-trans-3,4-methylenedioxy cinnamic acyl-3-methoxy tyramine had better anti-diabetic activity with IC50 value of 4.17mg/mL.