Robinetin (3,3′,4′,5′,7-Pentahydroxyflavone), a naturally occurring flavonoid with remarkable ‘two color’ intrinsic fluorescence properties, has antifungal, antiviral, antibacterial, antimutagenesis, and antioxidant activity. Robinetin also can inhibit lipid peroxidation and protein glycosylation^{[1][2][3][4][5]}.

Robinetin (0.1-10 μM; 1 h) inhibits HIV integrase cleavage and integration in a dose-dependent manner^[1].
Robinetin inhibits the DNA synthesis in Proteus vulgaris, and the RNA synthesis in S. aureus^[2].
Robinetin (100-200 or 25 μM; 1 or 72 h) inhibits egg yolk phosphatidylcholine (EYPC) membrane lipid peroxidation and hemoglobin A (HbA) glycosylation with high efficiency^[3].
Robinetin exhibits photo-induced excited-state intramolecular proton transfer resulting in ‘two color’ (in ‘blue-violet’ and ‘yellow-green’ regions) fluorescence characteristic of flavonols, the relative contributions between the two colors being strongly modulated by the local environment of the fluorophore^[3].

Shanghai Jinpan Biotech Co Ltd has not independently confirmed the accuracy of these methods. They are for reference only.

302.24

C₁₅H₁₀O₇

490-31-3

固体

Light yellow to yellow

洋槐黄素

• Flavonoids
• Flavonols

• Phenols
• Polyphenols

• 植物
• 其他科

Room temperature in continental US; may vary elsewhere.

4°C, protect from light, stored under nitrogen

*In solvent : -80°C, 6 months; -20°C, 1 month (protect from light, stored under nitrogen)

DMSO 中的溶解度 : 120 mg/mL (397.04 mM; 超声助溶; 吸湿的 DMSO 对产品的溶解度有显著影响，请使用新开封的 DMSO)

* 请根据产品在不同溶剂中的溶解度选择合适的溶剂配制储备液；一旦配成溶液，请分装保存，避免反复冻融造成的产品失效。
储备液的保存方式和期限：-80°C, 6 months; -20°C, 1 month (protect from light, stored under nitrogen)。-80°C储存时，请在6个月内使用，-20°C储存时，请在1个月内使用。

• 方案 一

  请依序添加每种溶剂： 10% DMSO    40% PEG300    5% Tween-80    45% Saline

  Solubility: ≥ 3 mg/mL (9.93 mM); 澄清溶液

  此方案可获得 ≥ 3 mg/mL（饱和度未知）的澄清溶液。

  以 1 mL 工作液为例，取 100 μL 30.0 mg/mL 的澄清 DMSO 储备液加到 400 μL PEG300 中，混合均匀；再向上述体系中加入 50 μL Tween-80，混合均匀；然后再继续加入 450 μL 生理盐水 定容至 1 mL。

  生理盐水的配制：将 0.9 g 氯化钠，溶解于 ddH₂O 并定容至 100 mL，可以得到澄清透明的生理盐水溶液。

• 方案 二

  请依序添加每种溶剂： 10% DMSO    90% (20% SBE-β-CD in Saline)

  Solubility: ≥ 3 mg/mL (9.93 mM); 澄清溶液

  此方案可获得 ≥ 3 mg/mL（饱和度未知）的澄清溶液。

  以 1 mL 工作液为例，取 100 μL 30.0 mg/mL 的澄清 DMSO 储备液加到 900 μL 20% 的 SBE-β-CD 生理盐水水溶液 中，混合均匀。

  20% SBE-β-CD in Saline 的配制（4°C，储存一周）：2 g SBE-β-CD（磺丁基醚 β-环糊精）粉末定容于 10 mL 的生理盐水中，完全溶解至澄清透明。

• [1]. Fesen MR, et, al. Inhibition of HIV-1 integrase by flavones, caffeic acid phenethyl ester (CAPE) and related compounds. Biochem Pharmacol. 1994 Aug 3;48(3):595-608.  [Content Brief]

  [2]. Cushnie TPT, et, al. Antimicrobial activity of flavonoids. Int J Antimicrob Agents. 2005 Nov;26(5):343-56.  [Content Brief]

  [3]. Chaudhuri S, et, al. Binding of the bioflavonoid robinetin with model membranes and hemoglobin: Inhibition of lipid peroxidation and protein glycosylation. J Photochem Photobiol B. 2010 Jan 21;98(1):12-9.  [Content Brief]

  [4]. Birt DF, et, al. Anti-mutagenesis and anti-promotion by apigenin, robinetin and indole-3-carbinol. Carcinogenesis. 1986 Jun;7(6):959-63.  [Content Brief]

  [5]. Manrique-de-la-Cuba MF, et, al. Theoretical study of the antioxidant capacity of the flavonoids present in the Annona muricata (Soursop) leaves. J Mol Model. 2019 Jun 25;25(7):200.  [Content Brief]