Figure 2.

Separation and X-ray crystal structures of redaporfin atropisomers. (A) Representative RP-HPLC chromatogram of redaporfin where the individual atropisomers were detected by absorption at 743 nm. (B) View of the molecular structure in the crystal of α₂β₂ and α₄ atropisomers of P11, where the α₂β₂ and the α₄ atropisomers were obtained from α₂β₂·2Me₂SO and α₄·4MeCN, respectively (ellipsoids are shown at the 50% probability level, and H-atoms are represented as spheres of fixed radius).