I-14-Hydroxylated brassinolide,28-homobrassinolide,28-epihomobrassinolide,24-epibrassinolide,22,23,24-trisepibrassinolide

Njengomlawuli wokukhula kwezitshalo, i-Brassinolide ithole ukunakwa okusabalele nothando kubalimi. Kunezinhlobo ezi-5 ezihlukene ze-Brassinolide ezivame ukutholakala emakethe, ezinezici ezifanayo kodwa futhi nomehluko othile. Ngoba izinhlobo ezahlukene ze-Brassinolide zinemiphumela ehlukene ekukhuleni kwezitshalo. Lesi sihloko sizokwethula isimo esithile salezi zinhlobo ezi-5 ze-Brassinolide futhi sigxile ekuhlaziyeni umehluko wabo.

Wonke ama-brassinolides okwamanje asemakethe angahlukaniswa abe izigaba ezimbili ngokombono wobuchwepheshe bokukhiqiza: i-brassinolide yemvelo kanye ne-synthetic brassinolide.

I-S-abscisic acid inemiphumela yempilo enjengokubangela ukuthi amahlumela amile, ukuchitheka kwamaqabunga kanye nokuvimbela ukukhula kwamaseli, futhi yaziwa nangokuthi "ihomoni elele".

Yatholwa cishe ngo-1960 futhi yaqanjwa ngephutha ngoba yayihlobene ukuwa kwamaqabunga ezitshalo. Kodwa-ke, manje sekuyaziwa ukuthi ukuwa kwamaqabunga ezitshalo nezithelo kubangelwa i-ethylene.