R1 R2 R3 Compound Abbreviation   H R G H H H trans-Zeatin trans-ZeatinRiboside trans-ZeatinGlucoside Z ZR ZG     H   H   DL-dihydrozeatin   DZ   H - Kinetin K

Note: H - hydrogen; R - β-D-ribofuranosyl; G - β-D-glucopyranosyl

Table 1: Cytokinins structure.