Patent ID: 7786106

Claim:
A compound represented by the following formula (I) or a salt thereof wherein X 1 is —C(═O)—NR 5 —, —NR 5 —C(═O)—, —CH 2 —NR 5 — or —NR 5 —CH 2 —; wherein X 2 is —C(═O)—NR 6 —, —NR 6 —C(═O)—, —CH 2 —NR 6 — or —NR 6 —CH 2 —; wherein R 1 is halogen atom, a lower alkyl which may be substituted with halogen atom or a lower alkoxy which may be substituted with halogen atom; wherein R 2 and R 3 are the same or different and each is hydrogen atom, halogen atom, CN, —NH—SO 2 -(lower alkyl), —NH—CO-(lower alkyl), —CO-(lower alkyl), —CO-(lower alkoxy), —CO—NH 2 , a lower alkyl which may be substituted with halogen atom, a lower alkoxy which may be substituted with halogen atom or —S-(lower alkyl); wherein R 4 is a sugar residue; wherein A is a benzene ring; wherein B is a benzene ring substituted with wherein R 5 and R 6 are the same or different and each is hydrogen atom or a lower alkyl; and wherein R 8 is a hydrogen atom, lower alkyl, —SO 2 -(lower alkyl) or a five- or six-membered hetero ring containing 1 to 4 hetero atom(s) which is/are one or more selected from a group consisting of N, S and O.