Gated-TIMS separation of dp4 and dp6 isomers.A, extracted ion mobility spectra ([M-3H]3−) of Compound 1 (blue trace), Compound 2 (red trace), and their mixture (black trace). Extracted ion mobility spectra ([M-3H]3−) of Compound 3 (blue trace), Compound 4 (green trace), Compound 5 (red trace), and their mixture (black trace). Reprinted with permission from reference (110). Copyright 2019 American Chemical Society.