2,5-Dichloro-4,6-dimethylpyridine-3-carbonitrile

It is not Opicapone itself but a precursor molecule used early in the multi-step synthetic pathway. 2,5-Dichloro-4,6-dimethylnicotinonitrile (which is another name for 2,5-dichloro-4,6-dimethylpyridine-3-carbonitrile) is a key intermediate in the synthesis of Opicapone.