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102 1 03 1 04 1 05 Molecular weight

Figure 9.50 Correlation between the percentage dose absorbed after nasal administration and molecular weight: 4-oxo-4H-1-benzopyran-2-carboxylic acid (chromocarb) (•); p-aminohippuric acid (A); sodium cromoglicate (O); inulin (■); dextran (♦); r # -0.996.

Reproduced from A. N. Fisher et ai, J. Pharm. Pharmacol., 39, 357 (1987).

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