Cyclodextrin derivatives include, e.g., those with short chain alkyl groups such as methylated cyclodextrins, and ethylated cyclodextrins, wherein R is a methyl or an ethyl group; those with hydroxyalkyl groups, such as hydroxypropyl cyclodextrins and/or hydroxyethyl cyclodextrins, wherein R is a ???CH2???CH(OH)???CH3 or a ???CH2CH2???OH group; those with (hydroxyalkyl)alkylenyl bridging groups su