and products from the monoalkylation thereof with propylene oxide aqueous 1 5 naoh used as solvent and catalyst as follows a alpha cyclodextrin b mono s 2 39 hydroxypropyl alpha cyclodextrin c beta cyclodextrin d 2o s 2 39 hydroxypropyl beta cyclodextrin e 2 o r 2 39 hydroxypropyl beta cyclodextrin f gamma cyclodextrin g mono s 2 39 hydroxypropyl gamma cyclodextrin the experimental conditions employed were the same as those used for the results described in connection with fig2 above to document that a product monosubstituted in position 6 can be prepared analogously the reaction described in example 6 was performed u03b2 cyclodextrin was condensed with s propylene oxide using a high concentration of alkali the monosubstituted product in that case when toluene was used as a complexing agent coprecipitated with u03b2 cyclodextrin from mass spectrum of the reaction mixture and comparison of the thin layer chromatography properties of authentic 2 o substituted product fig4 it is obvious that the product is different from 2 o 2 hydroxipropyl u03b2 cyclodextrin on the basis of the data in the previous application the product has to be 6 o 2 hydroxypropyl u03b2 cyclodextrin fig4 shows a thin layer chromatogram of the reaction products of beta cyclodextrin with s propylene oxide catalyzed by 30 d d aqueous sodium hydroxide wherein this path is identified by number 34 3 34 2 o s 2 39 hydroxypropyl beta cyclodextrin path 34 2 34 beta cyclodextrin path 34 1.