3-O-Methylquercetin 是分离自植物Rhamnus nakaharai的天然产物，可抑制总 cAMP 和cGMP-phosphodiesteRase (PDE)。它对PDE1、PDE5、PDE 和PDE4的IC50分别是31.9 μM、86.9 μM、18.6 μM 和1.6 μM。

3-O-Methylquercetin is a selective and competitive PDE3/PDE4 inhibitor, and inhibits PDE3 than PDE4 with a low Km value. 3-O-Methylquercetin inhibits total cAMP- and cGMP-phosphodiesterase (PDE) of guinea pig trachealis at low concentrations.

Formulations composed of octyldodecanol, egg lecithin, water (NE) and cetyl trimethyl ammonium bromide (CNE) were obtained by spontaneous emulsification. This procedure yielded monodisperse nanoemulsions exhibiting a mean droplet size of approximately 200-300 nm. Nanoemulsions were further characterized in terms of zeta-potential, surface tension, and morphology by transmission electron microscopy. The amount of flavonoids incorporated into nanoemulsions reached nearly 100% (at 1 mg/mL). The permeation studies were carried out using ear pig skin mounted in Franz diffusion cells[1]

1486-70-0

C16H12O7

316.26

(< 1 mg/ml refers to the product slightly soluble or insoluble )
Powder: -20°C for 3 years
In solvent: -80°C for 2 years