OH OH OH 20%HNO NO 25 NO2 15 30~40 OH NO 浓HNO3 浓HNO9 nO. ①D NO ⑨D NOOrganic Chemistry Organic Chemistry Xiamen Xiamen University University OH 20% HNO 3 25 OH NO 2 OH NO 2 + 15% 30~40% OH NO 2 NO 2 浓HNO 3 浓HNO 3 OH NO 2 O 2 N NO 2