2QPM:
reference: Phenyl- and benzylurea cytokinins as competitive inhibitors of cytokinin oxidase/dehydrogenase: A structural study., Kopecny D, Briozzo P, Popelkova H, Sebela M, Koncitikova R, Spichal L, Nisler J, Madzak C, Frebort I, Laloue M, Houba-Herin N, Biochimie. 2010 May 14. PMID: 20478354

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