Allopurinol-d2

1,5-Dihydro-4H-pyrazolo[3,4-d]pyriMidin-4-one-d2

4-Hydroxypyrazolo[3,4-d]pyriMidine-d2

4-Oxopyrazolo[3,4-d]pyriMidine-d2

Adenock-d2

Allopur-d2