7,6 Dioxo-4H,6H-pyrano[3,2-g]quinoline dicarboxylic acids and anti-allergic use thereof
There are described compounds of formula I STR1 in which an adjacent pair of R5, R6, R7 and R8 form a chain --COCH=CE--O--, and the remainder of R5, R6, R7 and R8, whi
