154365-37-4
ethyl 2-methyl-6-nitro-3-oxo-4H-1,4-benzoxazine-2-carboxylate
→
~89%
154365-44-3
2-methyl-6-nitro-3-oxo-4H-1,4-benzoxazine-2-carboxylic acid
99-57-0
2-氨基-4-硝基苯酚