| abstract |
The present invention relates to compounds of formula (I) and salts thereof. This compound can be used to prepare pharmaceutical compositions that are effective in preventing and treating allergic diseases associated with IgE production inhibitors or IgE antibodies.n n n <Formula I>n n n n n n n n N is 2 or 3,n n n R is straight or branched chain saturated alkyl of 4 or 5 carbon atoms, cyclopentyl, cyclohexyl, etc.,n n n Y is hydroxy or amino,n n n A is hydrogen, hydroxy, methoxy, nitro group, and the like,n n n Q is hydrogen, hydroxy or methoxy. |