The present invention relates to new compounds of Formula I ##STR1## and physiologically acceptable salts thereof wherein A and B stand for oxygen or --CH.sub.2 group with the proviso that if A stands for oxygen, then B stands for --CH.sub.2 group and R stands for hydrogen and, if A represents a --CH.sub.2 group, then B stands for oxygen, R stands for a --CH.sub.2 Q group wherein Q stands for hydrogen, and pyrrolidino, piperidino or morpholino and a process for the preparation thereof and pharmaceutical compositions containing as active ingredient a compound of the Formula (I) or a physiologically acceptable salt thereof.