2-Bromo-5-hydroxypyridine55717-45-830 % similar 2-Amino-5-hydroxypyridine55717-46-930 % similar 2-Bromo-5-iodopyridine73290-22-930 % similar 5-Bromopyrazine-2,3-diamine89123-58-030 % similar 3-Bromo-1H-pyrazol-5-amine950739-21-630 % similar