Prepare the necessary precursor compounds through various chemical reactions. For example, you may use nucleophilic substitution reactions, condensation reactions, or other methods to form the desired functional groups and build the backbone of the cryptand.
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(2R,3R,11R,12R)-3,12-Bis-phenylcarbamoyl-1,4,7,10,13,16-hexaoxa-cyclooctadecane-2,11-dicarboxylic acid dimethyl ester
3-O-benzyl-5,6-dideoxy-1,2-O-isopropylidene-5-(N-benzyl-N-propenylamino)-α-D-gluco-7-eno-octo-1,4-furanose
