1: 24.9 percent / acetic anhydride / pyridine / 30 h / 90 °C 2: 29.8 percent / nitric acid / Heating View Scheme

1: K2CO3 / H2O / 50 deg C, 10 min, then 100 deg C, 30 min 2: 24.9 percent / acetic anhydride / pyridine / 30 h / 90 °C 3: 29.8 percent / nitric acid / Heating View Scheme

nitric acid Heating;