
Keywords: 4- (2-hydroxyethyl) -1-piperazineethanesulphonic acid; BCS; bathocuproinedisulphonic acid disodium salt; CCA; coumarin-3-carboxylic acid; 5,7-DAC; 5,7-diacetoxy-3-ethoxycarbonylethyl-4-methylcoumarin; 7,8-DAC; 7,8-diacetoxycoumarin-3-ethoxycarbonylmethyl-4-methylcoumarin; 5,7-DHC; 5,7-dihydroxy-4-methylcoumar