67-56-1
甲醇
+
607355-53-3
8-nitro-4-oxo-4H-chromene-2-carboxylic acid
→
~10%
161369-33-1
4H-1-苯并吡喃-2-羧酸, 8-硝基-4-羰基-, 甲基酯
607355-65-7
8-amino-2-ethoxycarbonyl-4-oxochromane
103195-35-3
Ethyl 8-amino-4-oxo-4H-chromene-2-carboxylate