Complex sentence: Donepezil, marketed under the trade name Aricept by its developer Eisai and partner Pfizer, and also marketed under the brand name DONEP by "Alkem Pentacare," is a centrally acting reversible acetylcholinesterase inhibitor.
Split into simpler sentences: Donepezil, marketed under the trade name Aricept by its developer Eisai and partner Pfizer. It is also marketed under the brand name DONEP by "Alkem Pentacare," is a centrally acting reversible acetylcholinesterase inhibitor.