... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > carbon group molecular entity > organic molecular entity > organic ion > organic cation > pyridinium ion > GS4012 free base(1+)

... > chemical entity > molecular entity > ion > organic ion > organic cation > pyridinium ion > GS4012 free base(1+)

... > chemical entity > molecular entity > ion > cation > organic cation > pyridinium ion > GS4012 free base(1+)