2H-1-Benzopyran-2-one, 8-propoxy-3-(1H-tetrazol-5-yl)- 76239-27-5 8-Propoxy-3-(1H-tetrazol-5-yl)-2H-1-benzopyran-2-one 8-n-Propoxy-3-(1H-tetrazol-5-yl)coumarin