Patent ID: 8877720

Claim:
A compound of formula (I), a pharmaceutically acceptable salt thereof, a solvate thereof, or a solvate of the pharmaceutically acceptable salt thereof, wherein: R 1 represents H, F, OH, optionally substituted hydrocarbyl or optionally substituted hydrocarboxy; R 2 represents H or OH; W represents O or NH; R 3 represents H, F, OH, optionally substituted hydrocarbyl or optionally substituted hydrocarboxy; R 4 represents F or OR 7 , wherein R 7 represents H or 2-pyranyl; wherein is selected from the group consisting of a group represented by formula (II), a group represented by formula (V) and a group represented by formula (VI), wherein, n represents 1 or 2; X represents C═O or CR 21 R 22 ; Y represents C═O or CR 21 R 22 ; Q represents CH or N; R 10 , R 11 , R 12 , R 13 , R 15 , R 16 , R 21 and R 22 separately represent H, F, Cl, CN, OH, COOC 1-4 hydrocarbyl, OC 1-4 hydrocarbyl, C 1-4 hydrocarbyl or NR 18 R 19 ; R 18 and R 19 separately represent H or C 1-6 hydrocarbyl, or NR 18 R 19 together represents pyrrolidin-1-yl, piperidin-1-yl or morpholin-1-yl.