1-Methyl-1H-pyrazolo[3,4-B]pyridin-3-ylamine72583-83-633 % similar 5-Amino-1-methyl-1H-pyrazole-4-carbonitrile5334-41-831 % similar Methyl 5-amino-1-methyl-1H-pyrazole-3-carboxylate92406-53-631 % similar