Inhibition of Human Cytochrome P450 Enzymes by Allergen Removed Rhus verniciflua Stoke Standardized Extract and Constituents

Figure 1

Structures of Rhus verniciflua stokes constituents. (a) Urushiol: the likelihood and severity of allergic reaction to urushiol are dependent on the degree of unsaturation of the alkyl chain. (b) Fustin: 2-(3,4-dihydroxyphenyl)-3,7-dihydroxy-2,3-dihydrochromen-4-one. (c) Fisetin, 2-(3,4-dihydroxyphenyl)-3,7-dihydroxychromen-4-one.