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These molecules are able to block the action of cytokinins, and their effects may be overcome by adding more of the cytokinin. One of the most potent anticytokinins is 4-cyclobutylamino-2-methylpyrollo[2,3-d]pyrimidine. It has been however recently shown that these compounds act as inhibitors of cyclin-dependent kinases. Some ring structures which can give rise to competitive inhibitory activity are derived from BAP like PI-55.

3-METHYL-7-PENTYLAMINOPYRAZOLO[4,3-D]PYRIMIDINE

MW 219.29; crystalline; purity >97% (HPLC)
S:26, 36; CAS: 39974-49-7; C11H17N5
	011 0661	1	mg
	011 0662	5	mg
	011 0663	25	mg

4-CYCLOBUTYLAMINO-2-METHYLPYRROLO[2,3-D]PYRIMIDINE

MW 202.26; crystalline; purity >97% (HPLC)
S:26, 36; CAS: 71149-50-3; C11H14N4
	011 0671	1	mg
	011 0672	5	mg
	011 0673	25	mg

4-CYCLOPENTENYLAMINO-2-METHYLTHIOPYRROLO[2,3-D]PYRIMIDINE

MW 248.35; crystalline; purity >97% (HPLC)
S:26, 36; CAS: 54532-49-9; C12H16N4S
	011 0681	1	mg
	011 0682	5	mg
	011 0683	25	mg

2-CYCLOBUTYLAMINO-4-ETHYLAMINO-6-CHLORO-1,3,5-TRIAZINE

MW 227.70; crystalline; purity >97% (HPLC)
S:26, 36; CAS: 102587-50-8; C9H14ClN5
	011 0691	1	mg
	011 0692	5	mg
	011 0693	25	mg