R7 independently is hydrogen or an acyl group, for example an acetyl group, and R3 comprises O or R3 in Formula 99, and n is an integer from about 1 to about 20. [0190] In one embodiment, the W-SG component of a compound having Formulae 99 comprises a compound having Formula 103: [0191] wherein R1 comprises H, alkyl, alkylhalo, O-a