Patent ID: 7112698

Claim:
A compound of the following formula: wherein: R ALK is primary or secondary aliphatic saturated C 2-6 alkyl; two of R B2 , R B3 , R B4 , and R B5 are —OMe; and the others are independently —H or —OH; or: three of R B2 , R B3 , R B4 , and R 85 are —OMe: and the other is independently —H or —OH; each of R 1 and R 2 is independently: —H, optionally substituted C 1-4 alkyl, or optionally substituted C 5-20 aryl; R A3 is —H, —OH, —OC(═O)R E , —OS(═O) 2 OH, or —OP(═O)(OH) 2 ; R E is: —H, optionally substituted C 1-6 alkyl, optionally substituted C 3-20 heterocyclyl, or optionally substituted C 5-20 aryl; and pharmaceutically acceptable salt, solvates, amides, esters, and ethers thereof.