2H-1-Benzopyran-2-one, 8-(1-methylethoxy)-3-(1H-tetrazol-5-yl)- 76239-28-6 8-(1-Methylethoxy)-3-(1H-tetrazol-5-yl)-2H-1-benzopyran-2-one 8-Isopropoxy-3-(1H-tetrazol-5-yl)coumarin