1 H89 6-[4-(benzyloxy)phenyl]-1-(pyridin-4-ylmethyl)-1h-pyrazolo[3,4-B]pyridine-4-carboxylic acid 1.000 2 HTJ 6-phenyl-1-(pyridin-4-ylmethyl)-1h-pyrazolo[3,4-B]pyridine-4-carboxylic acid 0.758