2H-1-Benzopyran-2-one, 8-hydroxy-6-methyl-3-(1H-tetrazol-5-yl)- 76239-47-9 8-Hydroxy-6-methyl-3-(1H-tetrazol-5-yl)-2H-1-benzopyran-2-one 8-Hydroxy-6-methyl-3-(1H-tetrazol-5-yl)coumarin