Which one of the following is commonly used as urease inhibitor

Phenol phosphorodiamidate is most commonly used as a Urease inhibitor.
Urease inhibitors are those chemical compounds that inhibit the functioning of the urease enzyme. The urease enzyme catalyzes the hydrolysis of urea, forming ammonia and carbon dioxide.
These urease inhibitors are used as additives in synthetic urea fertilizer formulations to reduce the loss of fertilizer nitrogen from fields by slowing down the conversion of stable urea to volatile ammonia.