only two cytokinins were found in the trnas of cucumber cotyledons , namely n ( 6 ) - ( delta ( 2 ) -isopentenyl ) adenosine and n ( 6 ) - ( 4-hydroxy-3-methylbut-2-enyl ) adenosine in amounts of 12 and 318 nanograms , respectively , per gram of tissue .
C0022218
isopentenyl
C0001443
adenosine