N-(3-Succinimidyloxy-carbonyl-phenyl)-methyl-4-(2-(6-(3,4-dihydro-2H-1-benzopyranyl))-5-oxazolyl)-pyridinium bromide

N-(3-Succinimidyloxy-carbonyl-phenyl)-methyl-4-(2-(6-(3,4-dihydro-2H-1-benzopyranyl))-5-oxazolyl)-pyridinium bromide 90%