1: 7-hydroxy-2-oxo-2H-1-benzopyran-4-ylacetic acid With benzotriazol-1-ol; dicyclohexyl-carbodiimide in 1,4-dioxane T=20°C; 4 h; 2: monopropargylamine in 1,4-dioxane T=20°C; 5 h;