Patent ID: 8729293

Claim:
A compound of Formula III, or a pharmaceutically acceptable salt, enantiomer, or stereoisomer thereof, wherein W 1 is null and W 2 is independently selected from null, O, or NH; ----- represents an optional bond that when present requires that Q is null; each a and c are independently H, CH 3 , —OCH 3 , —OCH 2 CH 3 , or C(O)OH; each b is H, CH 3 , C(O)OH, or O—Z; each d is H or C(O)OH; each n, o, p, and q is independently 0 or 1; each Z is H or with the proviso that there is at least one in the compound; each r is independently 2, 3, or 7; each s is independently 3, 5, or 6; each t is 1; u is 0 or 1; with the proviso that when r is 7, s is 3; Q is null, C(O)CH 3 , Z, e is H or any one of the side chains of the naturally occurring amino acids; W 3 is null, —O—, or —N(R)—; R is H or C 1 -C 3 alkyl; and T is H, C(O)CH 3 , or Z.