Insight into the Therapeutic Potential of a Bicyclic Hydroxypyridone Compound 2‐[(2,4‐Dichlorophenyl)methyl]‐7‐hydroxy‐1,2,3,4‐tetrahydro‐8H‐pyrido[1,2‐a]pyrazin‐8‐one as COMT Inhibitor in the Treatment of Parkinson's Disease: A Molecular Dynamic Simulation Approach