A Caged In‐Source Laser‐Cleavable MALDI Matrix with High Vacuum Stability for Extended MALDI‐MS Imaging. - Zhou, Qiuqin; Rizzo, Stefano; Oetjen, Janina; Fülöp, Annabelle; Rittner, Miriam; Gillandt, Hartmut; Hopf, Carsten (Angewandte Chemie, 2023)