125093-28-9 21238-36-8 26495-81-8 26495-82-9 8-Hydroxy-GTP 8-Hydroxyguanosine triphosphate 8-Oxo-guanosine triphosphate 8-Oxo-rgtp 8-Oxy GTP Guanosine 5'-(tetrahydrogen triphosphate), 7,8-dihydro-8-oxo-