Patent ID: 8778874

Claim:
A compound represented by formula (3a): or a pharmaceutically acceptable salt thereof, wherein R A is X 1 —Ar 1 -X 2 —Y—X 3 —Ar 2 , wherein, X 1 , X 2 and X 3 are independently, 1) a single bond, 2) a heteroatom-containing group selected from the group consisting of —N═, ═N—, —NR 1 —, —O—, —S—, —SO— and —SO 2 , wherein R 1 is hydrogen or lower alkyl, or 3) an optionally substituted alkylene or an optionally substituted alkenylene, each of which is optionally interrupted by one or more of the same or different heteroatomic group(s); Y is —NR 2 CO—, —CONR 2 —, wherein R 2 is hydrogen or lower alkyl, wherein R 3 is alkylene; Ar 1 is a carbocycle or heterocycle which is optionally substituted and may have an unsaturated bond; Ar 2 is a phenyl substituted with aralkyloxy and optionally one or more additional substituent(s) selected from the group consisting of lower alkyl and nitro; R B is —OH, —NR 5 R 5 ′, —NH—R Q , —NH—COR Q , —NH—CONHR Q , —O—R Q , or —OR 6 , wherein R 5 and R 5 ′ are independently hydrogen or an optionally substituted alkyl, wherein each R Q is independently hydrogen, an optionally substituted alkyl, or an amino sugar residue, and wherein R 6 is an optionally substituted alkyl that optionally includes a heteroatomic group; R C is hydrogen or an optionally substituted alkyl that optionally includes a heteroatomic group; and R W is an optionally substituted alkyl.