Kumbicin C
Kojic acid
5-Hydroxy-2-(hydroxymethyl)-4H-pyran-4-one, NSC 1942
Karrikinolide
KAR1, Karrikin 1
Karrikin 2
KAR2
Kreysigine
(-)-Kreysigine, Kreysigin
Karrikinolide 3-ethyl ester
Kynurenic acid
NSC 58973, 4-Hydroxyquinoline-2-carboxylic acid, Quinurenic acid
Khellin
5,8-Dimethoxy-2-methyl-6,7-furanochromone
Kinetin
6-Furfuryladenine, FAP, KT, Kinetin (plant hormone), N-Furfuryladenine, N6-(Furfurylamino)purine, N6-Furfuryladenine, NSC 23119