(2)取該品粉末5g,加水50ml,置60℃水浴中溫浸20min,濾過。取濾液1ml,加三氯化鐵乙醇溶液2滴,產生暗綠色沉澱。另取濾液1ml,加5%α-萘酚的乙醇溶液2滴,搖勻,產生黃白色渾濁,緩緩沿管壁加硫酸0.5ml,兩液界面處顯紫色環,振搖後顏色變深,加水稀釋產生暗紫色沉澱。
胡黃連水浸劑(1:4)在試管內對堇色毛癬菌、同心性毛癬菌、石膏樣毛癬菌、許蘭氏黃癬菌、奧杜盎氏小芽胞癬菌、鐵鏽色小芽胞癬菌、羊毛狀小芽胞癬菌、石膏樣小芽胞癬菌、腹股溝表皮癬菌、紅色表皮癬菌、考夫曼-沃爾夫氏表皮癬菌、星形奴卡氏菌等皮膚真菌均有不同程度的抑制作用。
從胡黃連石油醚提取物中分離得的羅布麻寧對大鼠子宮有收縮作用,對蛙心有抑制作用。胡黃連分別用冷(4℃)和熱(回流)去離子水提取,兩種提取物凍乾後再用甲醇提取。這兩份提取物中能溶於甲醇的部分,對經典補體激活途徑的補體活性有較強的抑制作用,而冷水提取物中不溶於甲醇的部分則對經典補體激活途徑和旁路補體激活途徑的補體活性均有較強的抑制作用。
胡黃連根中含D-甘露醇,香草酸,茶葉花寧(apocynin),胡黃連苦甘Ⅱ,胡黃連甙(kutkoside),6-阿魏醯基梓醇(6-vanilloylcatalpol),婆婆納甙(veronicoside),米內甙(minecoside),支杉甙(picein),盾葉莢生桃甙,已乙醯基-6′-桂皮醯基梓醇(panta-acetyl-6-vaniloyl catalplol),六乙醯基梓醇(hex-aacetyl catalpol),還含戎蘆素類糖甙成分:25-乙醯氧基-2β-葡萄糖氧基-3,16,20-三羥基-9-甲基-19-去甲-5,23-羊毛甾二烯-22-酮(25-acetoxy-2β-glucosyloxy-3,16,20-trihydroxy-9-methyl-19-norlanosta-5,22-dienen-22-one),葫蘆苦素B-2-O-葡萄糖甙即海綠甾甙Ⅰ(cucurbitacin B-2-O-glucoside arvenin Ⅰ),23,24-二氫葫蘆苦素B-2-O-葡萄糖甙(23,24-dihydrocucurbitacin B2-O-glucoside),2-β-glucosyolxy-3,16,20,25-四羥基-9-基-19-去甲-5,23-羊毛甾二烯-22-酮(2-β-glucosyloxy-3,16,20,25-tetrahy-droxy-9-methyl-19-norlanosta-5,23,diene-22-one),2-β-葡萄糖氧基-3,16,20,25-四閎基-9-甲基-19-去甲-5-羊毛甾烯-22-酮(2-β-glucosyloxy-3,16,20,25-tetrahydroxy-9-methyl-19-norlanosta-5-ene-22-one),戎蘆苦素Q-2-O-葡萄糖甙(cucurbitacin Q-2-O-glu-coside),去乙醯氧基葫蘆苦素B-2-O-葡萄糖甙(deacetoxy-cucur-bitacin B-2-O-glucoside),海綠甾甙(arvenin)Ⅱ2-β-葡萄糖氧基-3,16,20,25-四羥基-9-甲基-19-去甲-5,23-羊毛甾二烯-11,22-二酮即莫須有蘆苦素O-2-O-β-葡萄糖甙(2-β-glucosyloxy-3,16,20,25-tetrahyolroxy-9-methyl-19-norlanosta-5,23-diene-11,11,22-dione,cucurbitacin O-2-O-β-glucoside),2-β葡萄糖氧基-16,20-二羥基-9-甲基--19-去甲-5,24-羊甾二烯-3,11,22-三酮(2-β-glu-cosyloxy-16,20-dihydroxy-9-methyl 19-norlanosta-5,24-diene-3,11,22-trione),2-β-葡萄糖氧基-16,20,22-三羥基-9-甲基-19-去甲-5,24-羊乞求甾二烯-3,11-二酮(2-β-glucosyloxy-16,20,22-tri-hydroxy-9-methyl-19-norlanosta-5,24-diene-3,11-dione),海綠甾甙Ⅲ,25-乙醯氧基-2-β-吡喃葡萄糖氧基-3,16-二羥基-9-甲基-19-去甲-5,23-羊毛甾二烯-22-酮(25-acetyloxy-2-β-glucopyra-nosyloxy-3,16-dihydroxy-9-methyl-19-norlanosta-5,23-diene-22-one),25-乙醯氧基-2-β-D-吡喃葡萄糖氧基-3,16,20-三羥基-9-甲基,-19-去甲-5,23(Z)-羊毛甾二烯-22-酮(25-acetyloxy-2-β-D-glu-copyranosyloxy-3,16,20-trihydroxy-9-methyl-19-norlanosta-5,23(Z)-diene-22-one),25-乙醯氧基-2-β-D-吡喃葡萄糖氧基-3,16,20-三羥基-9-甲基-19-去甲-5-羊毛甾烯-22-酮(25-acetyloxy-2-β-D-glucopyranosyloxy-3,16,20-trihydroxy-9-methyl-19-norlanosta-5-ene-22-one),,2-β-D-吡喃葡萄糖氧基-3,16,20-三羥基-9-甲基-19-去甲-5,24-羊毛甾二烯-22-酮(2-β-D-glucopyranosyloxy-3,16,20-去甲-5,24-羊毛甾二烯-22-酮(2-β-D-glucopyranosyloxy-3,16,20-trihydroxy-9-methyl-19-norlanosta-5,24-dinene-22-one),2-β-D-吡喃葡萄糖氧基-3,16-二羥基-4,4,9,14-四甲基-19-去甲-5-孕甾烯-20-酮(2-β-D-glucosyloxy-3,16-dihydroxy-4,4,9,14-tetram-ethyl-19-norpregn-5-ene-20-one),2,3,16,20,25-五羥基-9-甲基-19-去甲-5-羊毛甾烯--2-酮(2,3,16,20,25-pentahydroxy-9-methyl-19-norlanosta-5-ene-22-one)、2-6-O-桂皮醯基-β-D-吡喃葡萄糖氧基-3,16,20,25-四羥基-9-甲基-19-去甲-5-羊毛甾烯-22--酮[2(6-O-cinnamoyl-β-D-glucopyranosyloxy)-3,16,20,25-te-trahydroxy-9-methyl-19-norlanosta-5-one]。(2β,9β,10α,16α,20ξ,24ξ)-20,24-環氧-2-(β-D-吡喃葡萄糖氧基)-16,25-二羥基-9-甲基-19-去甲-5羊毛甾烯-3,11-二酮[(2β,9β,10α,16α,20ξ,24ξ)-20,24-環氧-2(β-D-吡喃葡萄糖氧基)-3,16,25-三羥基-9-甲基-19-去甲-5-羊毛甾烯-11-酮[(2β,3β,9β,10α,16α,20ξ,24ξ)-20,24-epoxy-2-(β-D-glucopyranosyloxy)-2,16,25-trhydroxy-9-methyl-19-norlanost-5-ene-11-one],(2β,9β,10α,16α,20ξ,24ξ)-20,24-環氧-2-(β-D-吡喃葡萄糖氧基)-16,25,26-三羥基-9-甲基-19-去甲-5-羊毛甾烯-3,11-二酮[(2β,9β,10α,16α,20ξ,24ξ)-20,24-epoxy-2-(β-D-glucopyranosyloxy)-16,25,26-tri-hydroxy-9-methyl-19-norlanost-5-ene-3,11-dione],(2β,3β,9β,10α,16α,20ξ,24ξ)-20,24-環氧-2-(β-D-吡喃葡萄糖氧基)-3,16,25,26-四羥基-9-甲基-19-去甲-5-羊毛甾烯-11-酮[(2β,3β,9β,10α,16α,20ξ,24ξ)-20-epoxy-2-(β-D-glucopyranosyloxy-3,16,25,26-tetrahydroxy-9-methyl-19-norlanost-5-ene-11-one)],(2β,9β,10α,16α,20β,24z)-2-(β-D-吡喃葡萄糖氧基)-16,20,26-三羥基-9-甲基-19-去甲-5,24-羊毛甾二烯-3,11-二酮[(2β,9β,10α,16α,20β,24z)-2-(Βd-glucopyranosyloxy-16,20,26-trihydroxy-9-methyl-19-norlanost-5,24-driene-3,11-dione)]及(2β,9β,10α,16α,20β,24z)-2-(β-D-吡喃葡萄糖氧基)-3,16,20,26-四羥基-9-甲基-19-去甲-5,24-羊毛甾二烯-11-酮[(2β,9β,10α,16α,20β,24z)-2-(β-D-glucopyranosyloxy)-3,16,20,26-tetrahydroxy-9-methyl-19-norlanost-5,24-diene-11-one]。