Claims
- 1. A compound of the formula ##STR29## wherein R.sub.1 is (a) hydrogen, lower alkyl or lower alkoxy, or (b) --CO--R.sub.4, tetrazol-5-yl or cyano in the 4- or 5-position;
- R.sub.2 is --CO--R.sub.4, tetrazol-5-yl, cyano or, when R.sub.1 has one of the meanings included in (b), also hydrogen, lower alkyl, lower alkoxy or a fused benzene ring;
- R.sub.3 is hydrogen or lower alkanoyl; and
- R.sub.4 is hydroxyl, amino, hydroxy-amino, tetrazol-5-yl-amino or lower alkoxy;
- an internal salt thereof, or a non-toxic salt thereof formed with a basic substance.
- 2. The compound of claim 1, which is the disodium salt of 4-(2-pyridyl-amino)-isophthalic acid.
- 3. The compound of claim 1, which is the dipotassium salt of 4-(2-pyridyl-amino)-isophthalic acid.
- 4. The compound of claim 1 which is the disodium salt of 6-(2-carboxyphenylamino)-nicotinic acid.
- 5. An antiallergic pharmaceutical composition consisting essentially of an inert pharmaceutical carrier and an effective antiallergic amount of a compound of claim 1.
- 6. The method of preventing or relieving allergic reaction in a warm-blooded animal in need thereof, which comprises perorally, parenterally, topically or by the respiratory route administering to said animal an effective antiallergic amount of a compound of claim 1.
Priority Claims (1)
Number |
Date |
Country |
Kind |
2735919 |
Aug 1977 |
DEX |
|
Parent Case Info
This is a continuation of copending application Ser. No. 929,664, filed July 31, 1978, now abandoned.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
3415834 |
Hoffmann et al. |
Dec 1968 |
|
Foreign Referenced Citations (3)
Number |
Date |
Country |
2409260 |
Jan 1975 |
DEX |
1162287 |
Aug 1969 |
GBX |
1264798 |
Feb 1972 |
GBX |
Continuations (1)
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Number |
Date |
Country |
Parent |
929664 |
Jul 1978 |
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