| abstract |
The present invention relates to a compound of formula (I) or a pharmaceutically acceptable non-toxic salt thereof:n n n Formula In n n n n n n n Wheren n n G is ,n n n Q is an aryl substituent optionally mono- or di-substituted with hydroxy or halogen;n n n T is halogen, hydrogen, hydroxyl, amino or alkoxy having 1 to 6 carbon atoms;n n n W is oxygen, nitrogen, sulfur or optionally substituted methylene;n n n X is hydrogen, hydroxyl or alkyl;n n n Z is an organic or inorganic substituent, optionally forming a ring with a substituent at position Q;n n n Independently represent an optionally substituted carbon chain;n n n k, m and n are independently 0 or an integer of 1 to 3;n n n R 3 , R 4 , R 5 and R 6 are the same or different and represent an organic or inorganic substituent. |