A convenient synthesis of novel tricyclic annulated pyrimidinone, namely 1-phenyl-
1,6,7,8-tetrahydro-4H-pyrazolo[3,4-d]pyrrolo[1,2-a]pyrimidin-4-one was described herein.
Cyclization was provided via A-ring modification of deoxyvasicinone (natural product). Biological
activities of this compound reveal promising acetylcholinesterase inhibitory activity of 82.48±0.76 %,
while showed moderate butyrylcholinesterase inhibitory activity