... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > pnictogen molecular entity > nitrogen molecular entity > ammonium ion derivative > 4-hydroxytryptamine(1+)

... > chemical entity > molecular entity > polyatomic entity > polyatomic ion > polyatomic cation > ammonium ion derivative > 4-hydroxytryptamine(1+)

... > chemical entity > molecular entity > ion > polyatomic ion > polyatomic cation > ammonium ion derivative > 4-hydroxytryptamine(1+)

... > chemical entity > molecular entity > ion > cation > polyatomic cation > ammonium ion derivative > 4-hydroxytryptamine(1+)

... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > carbon group molecular entity > organic molecular entity > organic ion > organic cation > 4-hydroxytryptamine(1+)

... > chemical entity > molecular entity > ion > organic ion > organic cation > 4-hydroxytryptamine(1+)

... > chemical entity > molecular entity > ion > cation > organic cation > 4-hydroxytryptamine(1+)