2H-1-Benzopyran-2-one, 7-methoxy-8-methyl-3-(1H-tetrazol-5-yl)- 7-Methoxy-8-methyl-3-(1H-tetrazol-5-yl)-2H-1-benzopyran-2-one 7-Methoxy-8-methyl-3-(1H-tetrazol-5-yl)coumarin 76239-44-6