Figure 2.

Molecular structures of the insecticides discussed herein. Notes on stereochemistry: Configurations of stereogenic centers are read directly in structures above from left to right throughout, a shortcut past naming conventions that are cumbersome here. β-cyfluthrin (β-CF): SRS-enantiomer shown in racemic mixture A (rac-A), and the SSR-enantiomer in racemic mixture B (rac-B). Bifenthrin (BF): RR-enantiomer of a racemic mixture is shown. λ-cyhalothrin (λ-CH): RRS-enantiomer of a racemic mixture is shown. α-cypermethrin (α-CP): RRS-enantiomer of racemic mixture shown. Deltamethrin (DM, RRS stereoisomer) is enantiomerically pure.