geroprotector 6-aminopurines cytokinin furans kinetin N(6)-furfuryladenine kinetin N-furfuryladenine 6-furfuryladenine N(6)-(furfurylamino)purine N-(furan-2-ylmethyl)-7H-purin-6-amine A member of the class of 6-aminopurines that is adenine carrying a (furan-2-ylmethyl) substituent at the exocyclic amino group. N-(furan-2-ylmethyl)-7H-purin-6-amine 6-(furfurylamino)purine