7-Amino-4-methyl-2-oxo-3-(2-oxo-2-(prop-2-yn-1-ylamino)ethyl)-2H-chromene-6-sulfonic acid 1mg

7-Amino-4-methyl-2-oxo-3-(2-oxo-2-(prop-2-yn-1-ylamino)ethyl)-2H-chromene-6-sulfonic acid 1mg