133386-21-7 9-(2-Deoxy-2-hydroxymethyl-beta-D-erythro-oxetanosyl)guanosine triphosphate Oxetanocin guanosine triphosphate Oxt-GTP Triphosphoric acid, P-((4-(2-amino-1,6-dihydro-6-oxo-9H-purin-9-yl)-3-(hydroxymethyl)-2-oxetanyl)methyl) ester, (2S-(2alpha,3beta,4alpha))-