1 PHR 3-(1,3,7-trihydro-9-D-ribityl-2,6,8-purinetrione-7-yl ) hexane 1-phosphate 1.000 2 TP6 3-(1,3,7-trihydro-9-D-ribityl-2,6,8-purinetrione-7-yl) 1-phosphate 0.703