... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > pnictogen molecular entity > phosphorus molecular entity > organophosphorus compound > organic phosphonate

... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > carbon group molecular entity > organic molecular entity > heteroorganic entity > organophosphorus compound > organic phosphonate

... > chemical entity > molecular entity > polyatomic entity > heteroatomic molecular entity > oxoacid derivative > phosphorus oxoacid derivative > phosphonic acid derivative > phosphonate > organic phosphonate

... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > pnictogen molecular entity > phosphorus molecular entity > phosphorus oxoacids and derivatives > phosphorus oxoacid derivative > phosphonic acid derivative > phosphonate > organic phosphonate