1: 2,3,4-trihydroxy-benzophenone With Na2B4O7; potassium hydroxide in water pH=~ 13; 2: dimethyl sulfate With potassium hydroxide in water T=5°C; pH=12 - 13; 24 h; 3: With hydrogenchloride in water pH=3;

acetic anhydride; lithium carbonate; sodium hydrogencarbonate Yield given. Multistep reaction. Yields of byproduct given;