37456-21-6 6,8-Di-t-butyl-4-oxo-4H-1-benzopyran-2-carboxylic acid 6,8-Di-tert-butyl-4-oxo-4H-1-benzopyran-2-carboxylic acid Fpl 52791 Terbucromil Terbucromil [BAN:INN] Terbucromilum [INN-Latin]