The requirements of compounds in the cyclamate series for sweet taste stimulation are: synclinal conformation between NH and SO in the aminosulphonate group, length less than 0.7 nm of the group on the nitrogen, and hydrophobic character of the latter group. A hypothetical receptor site for these compounds should have a spatial barrier at a distance of about 0.7 nm from the nitrogen interaction point with the receptor site, and a hydrophobic interaction area between the nitrogen interaction point and the barrier.

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