koningic acid koningic acid koningic acid (ka, also known as heptelidic acid) is a potent, selective, irreversible gapdh inhibitor. it is also a dna polymerase inhibitor. the koningic acid molecule, produced by fungi that consume sweet potatoes, has been shown to curb the excessive glucose consumption in tumors exhibiting the warburg effect and leaving healthy cells alone. koningic acid names preferred iupac name (2′s,5as,6r,9as)-1-oxo-6-(propan-2-yl)-1,5a,6,7,8,9a-hexahydro-3h-spirobenzoxepine-9,2′-oxirane]-4-carboxylic acid other names (+)-heptelidic acid identifiers cas number 74310-84-2 y 3d model (jsmol) interactive image pubchem cid 10945834 unii 6h8edv2nkq y inchi key: jesmscgutierov-rtwavkeysa-n smiles cc(c)1cc2(co2)31c=c(coc3=o)c(=o)o properties chemical formula c15h20o5 molar mass 280.320 g·mol−1 except where otherwise noted, data are given for materials in their standard state (at 25 °c , 100 kpa). infobox references