cyclamic acid

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A crystalline acid, C₆H₁₃NO₃S, used to produce cyclamates.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun chemistry A white crystalline organic compound, cyclohexane-sulphamic acid, whose salts, the cyclamates, have been used as artificial sweeteners