Amprolium121-25-5100 % similar Amprolium hydrochloride137-88-294 % similar Vitamin B159-43-838 % similar Thiamine hydrochloride67-03-836 % similar 3-[(4-Amino-2-methyl-5-pyrimidinyl)methyl]-5-(2-hydroxyethyl)-4-methylthiazolium70-16-633 % similar