| abstract |
The novel class of xanthenone-4-acetic acids represented by the general formula (I) <IMAGE> (I) where R1 represents up to two of the groups lower alkyl, halogen, CF3, CN, NO2, NH2, CH2COOH, OR2, OH, NHCOR2, NHSO2R2, SR2, SO2R2, CH2CONHR2 or NHR2 (where R2 is lower alkyl optionally substituted with hydroxy, amino or methoxy functions), at any of the positions 1-8 which are available, R1 may also represent the substitution of an aza (-N=) group for one or two of the methine (-CH=) groups in the carbocyclic rings and two of R1 on any two available adjacent positions may also represent the grouping -CH=CH-CH=CH- to form an additional fused benzene ring; and basic addition salts thereof, possess antitumour and antibacterial properties. |