Kladiev AA, Barsegyan SS, Akimova VD, Sandoval CAE, Uspenskaya EV. Direct-Injection ESI-MS/MS Method for Studying Fragmentation Pathways of Prospidium Chloride. J. Drug Delivery Ther. 2026;16(7):88-98. doi:10.22270/jddt.v16i7.7869