Wiktionary
cynarine
n. A hydroxycinnamic acid found in artichoke that inhibits taste receptors, producing a sweet taste.
Wikipedia
Cynarine
Cynarine is a hydroxycinnamic acid and a biologically active chemical constituent of artichoke (Cynara cardunculus).
Chemically, it is an ester formed from quinic acid and two units of caffeic acid.
It inhibits taste receptors, making water (and other foods and drinks) seem sweet.
It is an ingredient of the drug Sulfad.