59-49-4
2-苯并唑啉酮
+
111-36-4
异氰酸正丁酯
→
~48%
143207-32-3
N-butyl-2-oxo-1,3-benzoxazole-3-carboxamide
109-73-9
正丁胺
27087-39-4
17280-89-6
methyl 2-oxobenzo[d]oxazole-3(2H)-carboxylate