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

... > chemical entity > molecular entity > polyatomic entity > polyatomic ion > polyatomic cation > ammonium ion derivative > pergolide(1+)

... > chemical entity > molecular entity > ion > polyatomic ion > polyatomic cation > ammonium ion derivative > pergolide(1+)

... > chemical entity > molecular entity > ion > cation > polyatomic cation > ammonium ion derivative > pergolide(1+)