cardanols (ginkgols), and cardols.12−15 The structures of
these compounds are given in Figure 1. The ginkgolic acids
have also been designated as 2-hydroxy-6-alkylbenzoic acids,
6-alkylsalicyclic acids, and anacardic acids. These potentially
hazardous components are chemically similar to urushiols
found to be responsible for the allergenic properties of poison
ivy and sumac.16