1157855-12-3
N-(methoxycarbonyl)-N-phenyl-O-(methoxycarbonyl)hydroxylamine
→
~85%
17280-89-6
methyl 2-oxobenzo[d]oxazole-3(2H)-carboxylate
59-49-4
2-苯并唑啉酮
143207-32-3
N-butyl-2-oxo-1,3-benzoxazole-3-carboxamide