Abstract: Anti-asthmatically acting compounds of formula ##STR1## wherein R.sub.1 and R.sub.2 represent hydrogen, fluorine, chlorine, bromine, trifluoromethyl, C.sub.1 -C.sub.6 -alkyl or C.sub.1 -C.sub.6 -alkoxy and the radical A is the group ##STR2## wherein R.sub.3 is hydrogen, a phenyl radical, an indolyl-(3)-methyl radical, imidazolyl-(4)-methyl radical, a C.sub.1 -C.sub.10 -alkyl group or wherein R.sub.3 represents a C.sub.1 -C.sub.10 -alkyl group which is substituted by a carboxy group, a C.sub.1 -C.sub.6 -alkoxycarbonyl group, an aminocarbonyl group, a hydroxy group, a C.sub.1 -C.sub.6 -alkoxy group, a C.sub.2 -C.sub.6 -alkanoyl-oxy group, a mercapto group, a C.sub.1 -C.sub.6 -alkylthio group, a C.sub.2 -C.sub.6 -alkanoylmercapto group, a phenyl group, a hydroxyphenyl group, a dihydroxyphenyl group, an amino-C.sub.1 -C.sub.6 -alkylthio group, an amino-C.sub.1 -C.sub.6 -alkyloxy group, an amino group, a ureido group (H.sub.2 NCONH--) or a guanidino group or wherein R.sub.