9H-Purin-6-aminium, N,N,N-trimethyl-9-(tetrahydro-2-furanyl)-, chloride Ammonium, trimethyl(9-(tetrahydro-2-furyl)-9H-purin-6-yl)-, chloride Ammonium, trimethyl[9-(tetrahydro-2-furyl)-9H-purin-6-yl]-, chloride NSC53347 PF 19