2,2'-(1,4-Phenylene)bis-4H-3,1-benzoxazin-4-one-d4

2,2'-(1,4-Phenylene)bis-4H-3,1-benzoxazin-4-one-d4 (4H-3,1-Benzoxazin-4-one, 2,2'-(1,4-phenylene)bis-d4) is deuterium labeled 2,2'-(1,4-Phenylene)bis-4H-3,1-benzoxazin-4-one.