image    
R1 R2 R3 Compound Abbreviation
 image H
R
G
H
H
H
trans-Zeatin
trans-ZeatinRiboside
trans-ZeatinGlucoside
Z
ZR
ZG
 image   H   H   DL-dihydrozeatin   DZ
 image H - Kinetin K
Note: H - hydrogen; R - β-D-ribofuranosyl; G - β-D-glucopyranosyl
Table 1: Cytokinins structure.