Cromoglycic acid derivatives of the general formula ##STR1## wherein R.sup.1 is an .alpha.-, .beta.- or .gamma.-amino acid residue (for ester bonding) whose amino group may optionally be substituted by at least one lower alkyl group, and R.sup.2 and R.sup.3 each independently is a lower alkyloxy-substituted or an unsubstituted lower alkyl group, an 1-alkanoyloxyalkyl group, an 1-alkoxycarbonyloxyalkyl group, a phthalidyl group or a 5-methyl-1,3-dioxol-2-on-4-ylmethyl group; nontoxic salts thereof; and pharmaceutical compositions containing such compounds. Since the compounds have antiallergic activity and are readily absorbable into the blood stream, they are useful as oral antiallergic agents.
Cromoglycic acid derivatives(克洛莫酸衍
生物)的一般式为##STR1##其中R.sup.1是α-、β-或γ-
氨基酸残基(用于酯键连接),其
氨基可能被至少一个较低烷基基团取代;R.sup.2和R.sup.3各自独立地是较低烷氧基取代或未取代的较低烷基基团、1-烷酰氧基烷基基团、1-烷氧羰基氧基烷基基团、
邻苯二甲酰基基团或5-甲基-1,3-二氧杂环戊-2-酮-4-基甲基基团;其无毒盐;以及含有这些化合物的药物组合物。由于这些化合物具有抗过敏活性且易被血液吸收,它们可用作口服抗过敏剂。