| 4-((2-oxo-3-(1h-tetrazol-5-yl)-2h-1-benzopyran-8-yl)oxy)-butanoic aci |
| 4-((2-oxo-3-(1h-tetrazol-5-yl)-2h-1-benzopyran-8-yl)oxy)butanoic acid |
| 4-(2-oxo-3-(1h-tetrazol-5-yl)-2h-chromen-8-yloxy)butyric acid |
| 4-(2-oxo-3-(1h-tetrazol-5-yl)-2h-chromene-8-yloxy)butyric acid |
| c 4c |
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